You're right, the data DOES show nothing, the haters will SEETH *continues to murder the hoes online*
I don't know the literature too well but I've also heard that certain personality traits mediate the relationship between violent behavior and violent video games. So there's a small portion of people that are predisposed (presumably anti-social behavior) to subsequently engage in potentially violent behavior after playing games. In which case, is the problem really the games as the triggering factor or the nature of the individual?