There was a lot of wrong people in the thread I just closed. They believed that witnessing violence does not make you violent. This is wrong.
There was a famous experiment called the bobo doll experiment. Read about it here http://en.wikipedia.org/wiki/Bobo_doll_experiment.
Everything a child sees it learns. If it sees violence on TV, it leans how to be violent.
Here's the video of it
Seems pretty conclusive to me..