Other Causes of School Violence

Back to the topic of violence.... I was flipping through my Educator magazine and found a whole section devoted to the violence in schools - what teachers need to watch for, how to react in given situations, children who are doing things to stop it, etc. After doing all of the research for our game violence WebQuest, I found it interesting that no where in any of the three lengthy articles did they mention games as a cause. They talked about home life and things the children deal with at school but nothing about games. Are they trying to avoid it? Or are they thinking that something as simple as a game could not cause such violent acts as we have seen in schools? It would be interesting to know why they did not explore that avenue any further.