Has being too young been considered a crime here?

I just checked out the “Flag as” button on the profile page that the mods have just added. And I found out that one reason for flagging a user listed in the Flag as page was “being too young”.

Has it become inappropriate for people under 13 years old to sign in now? I already know the reason why Fluther restricts the appropriate age, but I just think it’s a bit too harsh to flag someone who is underage.