Page "Permission marketing" Paragraph 9

Spammers can easily obtain new e-mail addresses from websites and Usenet groups using software programs that “ trawl ” the Internet.

Individuals provide their addresses at these places for other purposes and hence, this violates their privacy rights.

In addition, marketers incur similar costs if they send out 1 million or 10 million e-mails.

Moreover, there are now programs that enable the large-scale use of deceptive practices ( like forged e-mail headers ).