I initiate the "Gamer Protection Act".
Have a test that needs to be taken and have a psychiatrist visit if wanting to play M games under the age of 16.
If a violent act is recorded by the school, then they can have privledges revoked for buying games, or playing games if the ID is connected to their Xbox Live/Wii Portal/PS3 Home/Steam menu/etc.
Solution to the big problem....
Problem: Parents buying M rated games for the kids.
Solution: Parents go in and give the retailers the name of the kid that they want to buy for. System scans for the name, and it comes up with the kid's info. Retailer either denies purchases or allows them.
It seems somewhat full-proof because the parents are no longer involved with any sort of decision.
MS could EASILY get away with a small update that requires this info, allowing 1 month for gamers to play without the card until they can go get one.