We are living in pretty liberal time right now. I would not say it is problem yet, but it could be in no time. For example, how many of you waited until you were twelve to finally make your account. For this reason is Facebook under pressure and I believe it is just right.
I know that young people are more and more mature even when they are younger. But Facebook is messy place. And some countries like Slovakia are going even beyond twelve-year line. Only sixteen-year-old and older will not need permit from parents.
This is new limit and Facebook will have to put reasonable effort in verifying actual parents. Tough place to be. But I think it won’t work.