I nominate the phony bomb threat against Scientology video that was posted on Youtube. The cult called the police to report it and handed them a video that they said they had copied off Youtube. But it was the high definition copy...the original! It even had some backgrounds in it that had also been used in Scn promo! .
Stoopid cult is stoopid!
When the Toronto police found out about this,they decided that Anonymous didn't have to stay on the other side of the street. They let them have the whole side street, both sides, right beside the org with the demonstration right against the row of windows of Div 6.

I have just discovered that the video analysis done comparing the two, by the not so stupid Anonymous has been removed from Youtube.
http://www.youtube.com/watch?v=U6pdGhHvwu8