Anyone with any knowledge or understanding of child psychology or just psychology in general will know that encouraging these sorts of games (violent) are not good for our children mentally! This is a post about the subject in general and everyone has their own points of view and ways of handling it, picking up on certain points that people have stated is unnecessary as you cant get the full picture on here! My son is 6 and I cant remember the last time he played his DS...he is far too busy with other activities such as football, lego, playing in the garden with mud and water, after school club and reading! and yes he does watch cartoons, I dont see anything wrong with that. However, we always talk about things and have conversations about whats right and wrong, this is teaching him to decide for himself what he thinks is right. I'm sure there will come a time when he wants to play these games, because his friends do and I will not allow it in my house....ever!! that is decision and I know I am doing it for the right reasons, he will just have to respect that it is an absolute no, having said that if he decides to do it at someone elses house then that is his choice, I will always promote and encourage my children to do other things, without making a point or drama about "not playing violent video games" i have always said I would much rather welcome my sons friends into our home for nights in, playing pool, taking them to the cinema, taking them fishing etc...
I think with everything it is all about moderation, there are children out there that do nothing but play these sorts of games because their parents cant be assed to do anything about it or are too busy to pay any attention! so their will be children out there that copy what they see as they dont have a positive influence to suggest otherwise or talk about whats happening.
I could go on but to me this is common sense and in my opinion anyone who allows their children to be "consumed" by these are letting their children down! I am not sorry if i have offended anyone because that is your problem not mine, the law has rated these video games 18 for a reason...do yourselves a favour and teach your children to abide by those rules!