Man, this is getting out of hand. Wish they held the contest on a vote/poll site to mitigate some of the shenanigans. Hope the organizers can handle this fairly...
The fans of the series don't realize that TN making direct contacts with the fans through their social network is a big chance for getting a dialogue with them and being able to show their own preferences/opinions.
This contest is one of the results of such interaction, until now such fan challenges were fated only to the Japanese people, finally with an increased globalization even the rest of the fans is able to enjoy similar opportunities. But if, few hours from the starting of it, this is the outcome, I can't say how this should encourage the developers to repeat similar things in future.
Sure, Facebook will not the be the definitive best way to hold a such contest, but it's not right to say that the partecipants have no responsability for such wrong behaviors...