My biggest issue is the whole 'blame the film' culture. That the UK is now on red alert as 'The Dark Knight Rises' comes to our shores. Sorry, but what a load of crap!!!
The Dark Knight when it came out never attratced that sort of attention, no one went crazy. It could have been any film, and that nutcase, would have gone gun crazy. Jeffrey Dahmer, who ate all those people back in the 90's used to love watching Return of the Jedi, since he liked the scenes of the Emperor, when he was being all scary.
People just use films as an excuse to account for people's immoral behaviour. Forgetting that, a very good way to prevent people from becoming nutjobs, is by being responsible parents. There again, some people are just born evil. Ted Bundy, didnt have much of an eventful beginning, but still he became a serial killer. By the same token, you get people like David Peltzer, who wrote those books starting with 'A child called It', and he turned out okay, despite being abused beyond belief.
I think society has always had this evil streak in itself, but as humans we are also capable of great beauty. It is unfortunately the minority, that attracts the attention, and we forget about all the people that turned out okay, and are living amongst us. Films just get the blame when they dont.