As video game sales when up, juvenile crime rates when down. Look up the Ferguson-Kilburn study on the subject. Edit: Upon further research, there was several errors in that study. I now understand that aggressive video games are a casual risk factor in later aggression. What that means to you is that someone who has played an aggressive game is slightly more likely to act aggressively than someone who did not play an aggressive game, in the same circumstances. Also added relevant picture.