I think that if children are interested in war and they don't go around shouting Die! Die! all the time then they can play a few war games. But if they start copying the games in real life then they have got a bit extreme. So if you play them a bit and don't go crazy about it then I think it is fine. Also War toys are fine E.G A nerf gun is just a little gun and it is just like lazer tag because your just playing against another team. If they play all the time and use it as there role model then they shouldn't play it but if they play them a bit, like me, that is fine.