Oh yes, I too like to pull a Leonardo DiCaprio. There's nothing like peeing in first class when you only paid for steerage. Also, the one at Salon Mickey is obviously lovely.
As for the parks, I'd say this is yet another field in which the Studios has nothing interesting to bring to the table. At the Disneyland Park however, there's the bathrooms at the entrance of Adventureland, where "A Whole New World" is played. I know most of Disney's bathrooms have a music loop, but for some reason the idea of that particular song working to drown out, well, other sounds always amuses me to no end.
And personally, I'm not a fan of the electric hand dryers.