I'm british so the whole "M for Mature" is "18" instead. That aside with games like GTA IV etc. I think its depends heavily on the maturity of the child.
I used to love GTA when I was a kid and then I got the game myself instead of just playing it at a freinds and realised it was really dull. Kind of aversion therapy i guess.
The kid will get bored and stop playing it in a couple of weeks and realise that shooting people in the groin is immature and dull eventaully. My long long rambling point is that theres no lasting harm they'll get bored of it soon enough.![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I used to love GTA when I was a kid and then I got the game myself instead of just playing it at a freinds and realised it was really dull. Kind of aversion therapy i guess.
The kid will get bored and stop playing it in a couple of weeks and realise that shooting people in the groin is immature and dull eventaully. My long long rambling point is that theres no lasting harm they'll get bored of it soon enough.