http://www.ubergizmo.com/2013/01/pre...t-video-games/
This sort of thing really annoys me, if 75% of parents really think there's a link between violent games and real-life violence, stop buying games with an 18 label for your 12 year old kids, instead of pushing the blame to someone else and trying to ruin another avenue of entertainment!
Personally, I doubt there's any real link between games and violence, it's just something convenient to blame, but still I reckon some of the stuff in mature games e.g. gore/dismemberment/zombles/etc could be highly disturbing for immature minds.