The killing i think depends on the game and the style. To me fantasy games like world of warcraft or star trek online(star trek, by the way, uses a "stun" gun at first instead of killing enemies) are ok for OLDER children and adults. Much like movies. A 12 year old child should not be playing war games because they can't even begin to understand what the REALITY of war is. TO be frank, i find war games to make a mockery of a very serious topic anyways and I refrain from them. If it is managed to be done in such a way that it is an accurate representation, perhaps it has its place but its not for me.

I think it is important for children and their parents to maintain an open dialogue about these games. If your child is playing war games, discuss war with them. Show them photos of their ancestors who were in wars. Teach them information about how war truly is - the reality of it. I suspect if more people did this, the way people glorify these things (war, in this case) would change.