Doing my regular trawl of the online chess news I cam across a story concerning a multi-million dollar lawsuit filed by chess identity Sam Sloan. Sloan is suing the Susan Polgar, and her husband Paul Truong, citing identity theft and forged postings on the Usenet newsgroup rec.games.chess.misc (and .politics etc). Certainly Sloan has a reputation on the net (and I've even met him in person), and this reputation has coloured how other people feel they can interact with him.
The Independent newspaper covers the story here, and there is also a mention in the New York Times (although you need to sign in to read that one).
I'm not going into the rights and wrongs of this case, but I suspect this is a case of one side being dragged down to the other sides level. For me the lesson from this should be "Don't argue with idiots"