It's a pity that it's too much to hope for that requiring a credit card to play a game is still no way to guarantee an adult-only playerbase.
Mate I'm 15 and I think most people around here would say I am a welcomed member of this community. You think that something as trivial and uncontrollable as age should stand in the way of our ability to play this game? It should be based around something much more contrallable e.g. maturity. Don't judge a person before you know them, alot of adults have less maturity than some teenagers