I actually don't think the video games are directly the problem. It's parents allowing their young, potentially impressionable children to play the violent video games.. I don't think it should be a big deal for a grown adult to play these games if they want.
That said, I have played these games since I was about 12 years old, and I don't have any intention of shooting anyone.
Ken
Unless they're still playing those games in their parents' basement and yelling for their Mom to make them another Hot Pocket