Michael has been grasping a conspiracy theories since the day the planes hit. I think Michael even bought into the "Timothy McVeigh - white guys" hijackers in the first couple of days. He also admits that his world was shattered as he was completing "Columbine" and here this massive attack was carried out without any guns.
I found this on Ray Bradbury's website but no quote from Ray himself:
On censorship, Bradbury is very clear in the F451 dialogues (Montague, Faber, and Beatty) that the main problem was not top-down censorship, but bottom-up laziness.
04/04/03
Author Ray Bradbury thinks Michael Moore's title will confuse people with his classic sci-fi novel Fahrenheit 451 and he wants Moore to change it. "He can't have my title," said Bradbury. "We've got an important film coming out [Fahrenheit 451], the book's having its 50th anniversary in October. If he wants his movie to be an homage to me, why not title it, 'Bradbury, where the hell are you now that we need you?'" (Variety)