* July 12 – The Phelps Dodge Corporation deports over 1, 000 suspected IWW members from Bisbee, Arizona.

* November 11 – The Centralia Massacre in Centralia, Washington results in the deaths of four members of the American Legion, and the lynching of a local leader of the Industrial Workers of the World ( IWW ).

IWW members played a role in the 1934 San Francisco general strike and the other organizing efforts by rank-and-filers within the International Longshoremen's Association up and down the West Coast.

Many IWW members opposed United States participation in World War I.

A statement was issued that denounced the war, but IWW members were advised to channel their opposition through the legal mechanisms of conscription.

In 1917, during an incident known as the Tulsa Outrage, a group of black-robed Knights of Liberty, a short-lived faction of the Ku Klux Klan, tarred and feathered seventeen members of the IWW in Oklahoma.

The IWW members had been turned over to the Knights of Liberty by local authorities after they were convicted of the crime of not owning war bonds.

Members of the IWW were prosecuted under various State and federal laws and the 1920 Palmer Raids singled out the foreign-born members of the organization.

In 1949, Tom C. Clark placed the IWW on the Attorney General's List of Subversive Organizations in the category of " organizations seeking to change the government by unconstitutional means " under Executive Order 9835 ( revoked in 1953 ), which offers no means of appeal, and which excludes all IWW members from Federal employment and even federally subsidized housing.

The 1960s Civil Rights Movement, anti-war protests, and various university student movements brought new life to the IWW, albeit with many fewer new members than the great organizing drives of the early part of the 20th Century.

IWW members have been active in the building trades, marine transport, ship yards, high tech industries, hotels and restaurants, public interest organizations, schools and universities, recycling centers, railroads, bike messengers, and lumber yards.

As of 2005, the 100th anniversary of its founding, the IWW had around 5, 000 members, compared to 13 million members in the AFL-CIO.

In very significant part this was due to the agitation of the IWW, a group which probably never had as many as 500 members in Australia at its peak.

The IWW founded the Anti-Conscription League ( ACL ) in which IWW members worked with the broader labour and peace movement, and also carried on an aggressive propaganda campaign in its own name ; leading to the imprisonment of Tom Barker ( 1887 – 1970 ) the editor of the IWW paper Direct Action, sentenced to twelve months in March 1916.

Eighty six IWW members immediately defied the law and were sentenced to six months imprisonment, this was certainly a high percentage of the Australian IWW's active membership but it is not known how high.

During the war over 100 IWW members Australia-wide were sentenced to imprisonment on political charges, including the veteran activist and icon of the labour, socialist and anarchist movements Monty Miller.

In 1939 the Australian IWW had four members, according to surveillance by government authorities, and these members were consistently opposed to the Second World War.

Allen's group soon disappeared, but the first IWW group in Britain was founded by members of the Industrial Syndicalist Education League around Guy Bowman in 1913.

More recently, IWW members were involved in the Liverpool dockers ' strike that took place between 1995 and 1998, and numerous other events and struggles throughout the 1990s and 2000s ( decade ), including the successful unionising of several workplaces, such as support workers for the Scottish Socialist Party.

Ever cognizant of the common practice of AFL craft unions crossing each other's picket lines, the IWW adopted the WFM's description of the AFL as the " American Separation of Labor.

The SLP formed an IWW Club in Sydney in October 1907.

The 1908 split between the Chicago and Detroit factions in the United States was echoed by internal unrest in the Australian IWW from late 1908, resulting in the formation of a pro-Chicago local in Adelaide in May 1911 and another in Sydney six months later.

A series of arson attacks on commercial properties in Sydney was widely attributed to the IWW campaign to have Tom Barker released.

He was indeed released in August 1916, but twelve mostly prominent IWW activists, the so-called Sydney Twelve were arrested in NSW in September 1916 for arson and other offences.

After the Second World War, the IWW would become one of the influences on the Sydney Libertarians who were in turn a significant cultural and political influence

Writing in 1919, Paul Brissenden quoted an IWW publication in Sydney, Australia:

Among the party's founders were a prominent Sydney trade unionist, John Garden, Adela Pankhurst ( daughter of the British suffragist Emmeline Pankhurst ) and most of the then illegal Australian section of the Industrial Workers of the World ( IWW ).

In return the IWW ran a ' free speech movement ' campaign in which over 80 members in Sydney were sentenced to 6 months hard labour ( the maximum ) for simply proclaiming their membership, which was enough to scare many others away from open defiance.

A chain of international protests about the Sydney Twelve IWW prisoners followed.

The prosecution in this case made every effort to connect this murder with the charges against the Sydney IWW men, which provided propaganda in the prosecution of the Sydney Twelve.

There was an active campaign for the release of the Sydney Twelve and other IWW members held in prison.

He joined the Industrial Workers of the World ( IWW ) and became known as one of their best public speakers, regularly drawing large crowds at The Domain, Sydney speaking against conscription, and for militant direct action against the war and capitalism.

The IWW was founded in Chicago in June 1905 at a convention of two hundred socialists, anarchists, and radical trade unionists from all over the United States ( mainly the Western Federation of Miners ) who were opposed to the policies of the American Federation of Labor ( AFL ).

The convention, which took place on June 24, 1905, was then referred to as the " Industrial Congress " or the " Industrial Union Convention "— it would later be known as the First Annual Convention of the IWW.

The IWW was founded in Chicago in June 1905 at a convention of 200 socialists, anarchists, and radical trade unionists from all over the United States.

In June 1920, he appointed Judge Norman Ewing to carry out a royal commission in to the imprisonment of twelve IWW members in 1916 for treason, arson, sedition and forgery.

Mattachine members are seen leafleting, attending meetings and participating in the Annual Reminder picket in Philadelphia.

The result was members of Fluxus, such as Nam June Paik and Jackson Mac Low, crossing a picket line made up of other members, including Ben Vautier and Takako Saito who handed out leaflets denouncing Stockhausen as " a characteristic European-North American ruling-class Artist ".

Rivers and Zinn were among a group of faculty members who in 1979 defended the right of the school's clerical workers to strike and were threatened with dismissal after refusing to cross a picket line.

The United States Supreme Court in March 2011 ruled in Snyder v. Phelps that church members had a free speech right to picket.

The act of working during a strike – whether by strikebreakers, management personnel, non-unionized employees or members of other unions not on strike – is known as crossing the picket line, regardless of whether it involves actually physically crossing a line of picketing strikers.

Companies that hire strikebreakers typically play upon these fears when they attempt to convince union members to abandon the strike and cross the union's picket line.

The Homophile Movement was influenced by the successful activism of the Civil Rights Movement ( in 1960 the DOB's national president was Cleo Bonner, an African-American ), and higher profile members of the DOB such as Barbara Gittings, Del Martin and Phyllis Lyon began to picket the White House, the State Department, and other federal buildings in 1965 and 1966 with members of the Mattachine Society.

Industrial unionists observe that craft union members are more often required by their contracts to cross the picket lines established by workers in other unions.

In 1974, during a picket of two hundred nuns with wheelchairs and crutches outside the annual American Medical Association ( AMA ) conference, four Gray Panther members dressed as medics rushed to the conference ’ s main entrance to make a house call on “ the sick AMA .” Another member dressed as “ the sick AMA ” was assisted by the “ medics ” from the entrance to a nearby ambulance.

Engineers and technicians who were members of the International Brotherhood of Electrical Workers refused to cross the AFTRA picket line, leaving the station's management and other non-union employees to produce the three-hour inaugural broadcast.

The bill says that demonstrators are not allowed to picket from 2 hours before the funeral service until 2 hours after, and requires that protestors stay at least 300 feet away from grieving family members.

On February 18, 2009, two days before the intended picket date, the Home Office announced that Fred Phelps and Shirley Phelps-Roper would be specifically excluded from entering the UK for having " engaged in unacceptable behaviour by inciting hatred against a number of communities ", and that " other church members could also be flagged and stopped if they tried to enter Britain ".

During a picket in Seaford, Delaware on May 21, 2006, one person broke through police lines and assaulted WBC members who fled into a police van.

The Avengers deal with frustrated members of the public, who picket Avengers Mansion and then force their way in to vandalize the building.

The following day, the pilots ' union voted to end its strike, after about 800 of its members had crossed picket lines, and many others had taken early retirement or gone to work for other airlines.

Lastly, the ' Street Heat ' program funneled funds and staff to CLCs and unions so that they could develop rapid-response teams of union members to picket and / or protest when workers were intimidated, coerced or fired.

The gates outside Temple Square are popular places for those critical of the Church where critics, mainly former members and activist evangelical ministers, often picket and hand out tracts and literature critical of the LDS Church.

He was chairman of the Ohio delegation to the 2004 Democratic National Convention in Boston, where he urged members of his delegation not to cross picket lines in the event of a labor dispute between Boston's Mayor and its police union.

Protest and verbal abuse are routinely aimed against union members or replacement workers who cross picket lines (" blacklegs ") during industrial disputes.

NWP members picket the White House in 1917 ; the banner reads, " Woodrow Wilson | Mr. President, How Long Must Women Wait For Liberty.

A rally of the trade union UNISON in Oxford during a strike on March 28, 2006, with members carrying picket signs.

Similarly, even though an arbitrator held that the 1935 Agreement prohibited sympathy strikes, the union's members nonetheless refused to cross other unions ' picket lines.