I'd use the Zoo as a jail for hackers or spar PKers, etc. and force them to be dressed up as a specific animal w/o them being able to change. This will happen automatically when they're warped to the cell. And whenever they try to talk their words would be replaced with "Rawr!", or "Moo!", etc. depending on their animal.
I may not be able to script this but I know for a fact this is easily possible!