Violent media may inure people to violence a tiny bit but that's it. The world has always been a violent place and always will be. Remove all the violent media and replace it with sunshine and rainbows and their will still be violence. You want to put a major dent in it then end poverty. That's the only thing that makes a real difference.
"We choose the right to be who we are. We know the difference between the reality of freedom and the illusion of freedom."