There is evidence for the attacks on WTC. There are books written about it, articles (both by respectful and not so much people), youtube videos (same thing). I would not judge the WTC conspiracies on the basis of any video that contains the word "illuminati". But there are some curious articles, books and videos. Even Charlie Sheen jumped in.
About the joker, only strange thing I know about that is the fact that there were look-alikes of him at the olympics (I posted the picture here) while also featuring batman and robin. Crazy.
And the people that relate mind-control to some of these things, the thing is, if there were mind-controlled people or experiments with them gone bad, we would never know and would treat them as criminals, damaged people or wackos as we do with shooters like Cho, etc... The thing is we are currently working and advancing everyday on mind-controll and interactions of mind and matter technology. This is absolutely unquestionable, it is already completely proved. Plus there are some reports from the past that I don't know what to make of, like professional hypnotist controlling a person, including from a distant place, to commit a crime.http://www.youtube.com/watch?feature=player_embedded&v=cgRa4-S-UhQ#at=11
The video above could have been a joke by the people involved or not. Except that there is only one right answer, and we don't know which one.