Some of the most mature both on track and off track in the forums here I have found to be of a young age. I have countlessly been amazed when I find out someone is of sub-driving age.
Jakg, W.Gooden, C.Modoff (is it C? cant' remember. and where have those guys been anyways...), infiniti, possibly Cropsy, are just a few names that were of a young age when I "met" them on the LFS servers in the last 2.5 years. I think I can add mcintyrej to the list as well now that I see he is 15. Never raced him, but I believe I can recall his posting on the forum to be quite mature.
I also fly online with a 14 year old from California. Another one I was surprised over when I heard him for the first time on Teamspeak. Flew with him for a few years before I found out his true age.
Many of the "kids" here on LFS and on the flight sim servers come out to be more mature than many of the adults.
To answer your question.... Race! Don't get caught up with the immature crowd of the "drifting" community. I put "drifting" in quotes because not all are the Fast and the Furious kiddie drifters. There is a community of well mature drifters out there who are practicing the true art of drifting as a proper motorsport and not the FnF "I'm so 1337" style drifting.