I would be glad to meet up in TF2. Sounds like a lot of awesome!
My belief is that video games help to decrease violence, because people who have them have a form of stress relief and escape from reality. Without video games, we would have a completely different situation on our hands. Video games also provide companionship for the neglected.
The only real solution that we have, though, for eliminating violence would be to entirely remove all of the mentally deficient sociopaths from the human race as a whole.