I was so appalled by the abuse of Google and Wikipedia by gangs of anonymous stalkers based in unmoderated Usenet news groups, that I composed a series of documents I think you'll find interesting.

Google's Defamation Superhighway

http://www.fireflySun.com/book/Google.php

Abuse of Wikipedia

http://www.fireflySun.com/en.wikipedia.org.php

Abuse of Amazon.com

http://www.fireflySun.com/book/stalkers.php

Meet the Stalkers of Sci.Psychology.Psychotherapy

http://www.fireflySun.com/book/sci.psychology.psychotherapy_stalker_profiles.php

Main Cyberstalking Report

http://www.fireflySun.com/book/sci.psychology.psychotherapy.php