I don't know, nor do I care, what statistics have to say about this, but as a guy who was within this age group all too recently, I can firmly assert that the vast majority of high school kids watch these types of movies. Thus, there is absolutely no reason to enforce this sort of rating system. Kids who are actually young enough to matter should already be patrolled by their parents. Teenagers are more than capable of handling the violence of these games, having already been desensitized by movies. Even if an attempt to enforce this type of system were made, it would be worthless.
Teenagers see plenty of R rated movies, even if they are under seventeen.
They would just as easily be able to play M rated games. Worse comes to worse, they would just use the same fake ID they use to buy cigarettes or beer. Ah, we can always count on Bane for a cool head and common sense. Band has his own take on the topic as well. The outrage over violence in computer games has been heard several times after schoolyard tragedies involving weapons in North America.