Thread:Sannse/@comment-25445166-20140928162739

http://spongebob.wikia.com/index.php?title=Special%3ALog&type=block&user=Nicko756&page=User%3ACosmobo&year=&month=-1 - this shows the user 'Cosmobo', being blocked for being underaged, 12 specifically.

If that is not enough proof for you, I'll show you chat logs where it says that he is 12, thus underaged. 