Mike Corley
From ED: 'As described in his website, Corley believes that the British internal security service, MI5, has a bullying campaign against him as a psychological experiment. He believes that this is mainly conducted through the British TV and radio media in which any use of the word 'mad' or similar is a direct reference to him. He has offered a £20,000 sterling reward for information directly leading to exposing what he calls the "BBC Newscaster Conspiracy", that BBC newscasters are able to watch him via a hidden camera in his TV set. He also believes that his office, home and friends' homes are bugged. Corley freely admits to having suffered from paranoia and having been treated for mental illness, but he therefore considers that he is best placed to know what madness feels like and is confident that the conspiracy is not part of it.'

Famous for spamming all over Usenet about the above. There's even a fecking opera about it: en.wikipedia.org/wiki/The_Corley_Conspiracy
( idonthaveafunnynickname Drink-Aware? Sure. I'm aware I want another drink., Tue 1 Sep 2009, 0:22, 1 reply)

I used to get faxes from him
During the time I worked for an MP he spammed us (and other MPs' offices) with 8 or 10 page faxes (they varied slightly in content) which had the whole conspiracy laid out. I recall there was something about Chris Tarrant that particularly freaked him out.

Anyway, I believe the police went round in the end, got him back on his medication, and the faxes stopped. Either that or they took away his auto-dialler...
(annexed, Wed 2 Sep 2009, 16:26, closed)