No. But there's no way in hell I'd ever do it, or dress as a pony for any reason. Pony T-shirts are OK.
So that wasn't you in the chat? Oops..
Haha what?! Don't you people check IPs? LOL....
For the record dressing up as characters from any media is one of the things I find ridiculous and would be quite ashamed to be one of the people wearing a costume to the new Batman movie on opening night or anything like that. Same for ridiculously dressed people in sports stands (Swedish Cheese's signature being a perfect example) I'm very plain when it comes to fashion. Dressing ridiculously like that in the opposite direction I dislike as much as dressing formally.