This is a down and dirty COPPA age verifier. This function takes 3 args. A birthday, a birthmonth and a birthyear and returns the users actual age if it's good and false if it's
non-compliant. Throw this into a general include file and slap it in your library and you won't have to worry if you're letting any kids in. This is an important issue since
it's illegal to gather user data if the person is under 13 years old.