What's the point of going to a furry con if you can't have the run of the place? Especially at a smaller con where there isn't much "programming," mostly just a lot of people socializing, in suit, out of suit, and the go-to place for that is the lobby and other public areas of the hotel. For a lot of people the draw is fursuiting in a public area, albeit within the relative safety of an organized event.
If I'm going to drop a not insignificant amount of money to stay the weekend at a furry con hotel, I expect to be able to wander around the whole thing, not just some back room where they shoved all the furries so they wouldn't embarrass anyone. I don't think that wanting to get your "money's worth" out of something is an immature attitude in the least.
IIRC Califur dropped a hotel like a hot sack of crap a few years back because they wouldn't afford the con the entire public space within the hotel. I think the only "reasonable" restriction imposed by a hotel on fursuiting, is the new con in Reno which doesn't allow costumes in the casino.