User blog comment:Ihaveawiixboxds/Underage Users Shouldn't Be Allowed./@comment-Reminal-20121118181050/@comment-Apple123350-20121118182753

I don't think it depends on maturity. Otherwise, the COPA "rules" would have said something like, "No-one under the age of 13 may sign up to anything, bla, bla, bla, UNLESS, they are mature enough."