True, the games should be in moderation as well, but I have seen numerous instances of negligence on part of parents. Your kid is 12, why let him play PG-13 games? A lot of people, need to be strict in this case.

this is indeed a very complex situation, like a algorithm, for which we know one of the 'possible answers' but not the answer as of yet.

On a second thought, I do think thats not the best possible example :/