While we're all waiting with bated breath for the newest revelation (about aliens) supposedly coming from the self-appointed whistleblowers of the internet, here's some background on the origin of the Guy Fawkes symbol. It's that ugly mask you see used online by Anonymous. For anyone else who wonders where the heck this kind of thing starts and why.
I have to say that the whole thing is just a little too sleazy and not really the credible social movement that the teenage 'anarchists' wish they had invented. But anything related to comic books and LSD has that effect on me.
The wikipedia article on V For Vendetta (the movie, not the book, apparently, and the medium of the age twelve to fifteen crowd) tells much of the tale, too.