A short final (I hope) comment on the Anime LA disqualifications...
10 years ago, if it had been discovered after the fact that someone had broken the rules in a masquerade, it would have been well nigh impossible to get the word out.
Rules-breakers could therefore do so with much greater impunity before folks caught on.
Things are a bit different now. Ah, the wonder that is teh Intarwebs. :-)