Wholly agree with the need to compare to physical activity. I did boxing in high school and it was a huge stress reliever. I don't believe it made me more violent, if anything, the opposite. I got out all my aggression and felt pretty great. I'd also like more granularity into "violent" games. I had to stop playing League because it turned me into a horrible person. But graphic games like Battlefield have yet to affect my behavior. I've been a vegetarian my entire life, but I was the kinda kid who would shoot 1000 pounds of meat and only bring 80 back to the wagon in Oregon trail. So while this is an interesting study, I'd like to see more.
We don't even need to do that. Just compare the amount of rioting that occur when a team lost or won a championship versus the amount of rioting caused by videogames.But nobody seems to ask whether football leads to antisocial violence, even though you could see that in Steubenville; nor does anyone ask whether cheerleading is dangerous, even though it has a pretty astounding injury rate.