User blog comment:Vixenblaze/COPPA?/@comment-1038387-20141026210148

A user who registers while under 13 doesn't violate COPPA - Wikia does. COPPA forbids (American) companies from storing personal info of under-13s. The user does violate Wikia's Terms of Use, which is set up to give them some protection.

I'm not sure if blocks are handed out retroactively. I've never seen it happen, but that doesn't mean much.