User blog comment:Universalguardian1003/Age question/@comment-168424-20110504171324/@comment-26686429-20110504172717

The age limit in this case is a US privacy law called COPPA. Can't remember 100% - but essentially it's an offense to knowingly ask for data from children under 13 without parental consent, this is why most websites have that you have to be 13 to sign up for a user account. Wikia asks for date of birth on signup IIRC. If you have a concern, you can - and they'll look into it (they're obliged to disable the account if they say they're under 13) I don't see any reason in blocking users that "seem" under this age, because that's a very hard thing to judge.
 *  Random Time  17:27, May 4, 2011 (UTC)