User blog comment:Aj732/PROTEST/@comment-5065259-20150808094000/@comment-1038387-20150808220850

Blocking isn't the point. This isn't about "a user under 13 edits on a wiki". It's "Wikia knowingly stores information of an under-13 thus violating COPPA." They are legally obligated to dispose the information, and in doing so, disable the account. Hence "technical limitation".