This would work. (I'm really tired of stuff like suck and crap being censored) But this could easily be changed, the only way to ensure that your 13+ would be make a skill testing question that anyone 13+ with an average iq should be able to answer. Also, you should also have to answer a question when you create an acount. (put something under the answer box like, "Parents, please don't answer this for your child, this game is ment for teenagers 13+"). Thats the solution for age identification.