Many years ago when I was a Trooper, after I left the Army, I was part of the contingent that responded to the shooting at Virginia Tech. When in the academic building and dorms in which the shootings occurred, you could feel, smell, and see the death. These kids who play video games in which they take lives don't know what that is like.
They also do not know the fear that grips you when you fear for your own life, out in the world, thousands of miles away from the relative safety of your home and anyone who gives a true damn about you. Sitting in one's home, eating Cheetos and drinking Mountain Dew, while playing video games and screaming at virtual characters does not produce responsible and respectful contributing members of society.
We need to stop these video games before they sear the consciences of these children, and make military service mandatory. When you realize that someone can inflict the same pain and suffering on you that you can inflict on them, there is instant respect for your fellow man.