At least this makes more sense than, “the darn video games made my boy kill” protests. Saying that video games or other media cause people to commit violence is simply not supportable. All of the studies that I’ve seen merely correlate violent media with acts of violence (and they don’t even do this well). All that says is that people who are violent like violent media. Anyone with an ounce of research savvy can tell you that this means very little. Correlation and causation are very different, with the latter being very difficult to substantiate.
So, before you start bad mouthing the media, it might be a good idea to think about parenting, genetics, or other explanations that also correlate with violent behavior.
Be careful of the band wagon.