Yeah parental control is what is needed, not a ban like a lot of people have been suggesting lately...
My view has always been the same, violent videogames do not make somebody go out and shoot/stab/attack/etc someone. If somebodies going to do it then a violent videogame will not push them over the edge. A videogame is not a motive to go and do something of a violent nature, therefore if a person goes out and attacks someone "because of a videogame", then this proves that they were mentally unstable in the first place, as somebody with no motive to hurt someone, who actually does do it, could do it at any time regardless of a videogame.