From the registration info:
If you are under the age of 13, the administrator may require that a parent or guardian provide consent before allowing you to complete the registration process. More information about this is available during the registration process.
It's not mental because my wife would never allow it. She says I spend too much time on hobbies anyway. So I was able to sign up on my own without any approval. And why I'm at it I guess I should thank EVERYONE for letting me hang out on this great web site.