There have always been crazy people killing many people before mvies and TV and such. The problem is you can't stop people that are determined to do harm to others and sometimes it's impossible to know when they will strike. 9/11 didn't happn because those people saw to many episodes of the A Team or they had heard Ozzy to many times. Jack the Ripper didn't need Marylin Manson to make him go off the rails. So many examples and none of them needed one mass media outlet to convince them to kill anyone or a gun to do it.
I agree. However I do wonder just how much people have been desensitized to violence, because of our modern culture. And NO I'm not saying that we need 0bama to step in and regulate tee vee, movies, and music, and so forth so it has no violence or anything like that, but it is a bit ironic if you think about it that people going to see a movie with a ton of people getting killed and stuff blowing up, for entertainment ended up getting shot for real. And, don't misunderstand me, I'm not saying they were at fault, I totally blame the shitstain that pulled the trigger, but I do see a little bit of irony in it.