We have only come across it once or twice so far, i try to walk a middle ground, I wont have toy guns/swords (though with 2 girls no one has tried to give them any) (Ugh gendered gifts whole other issue ) The couple of times i have heard shooting/killing games i have stepped in and asked why they are playing that.. to talk through it.. both times it was instigated by friends with older siblings and my 5yo has not seemed comfortable in the game, so perhaps a factor i will deal with more as they get older. We are aware of what they watch, but it seems to me the more violent kids television is on the commertial channels and we dont have those on really.