From nakedjen's site:
10. When attempting to take a naked picture lying on Mickey’s Bed, alarms will go off. There’s a reason that there is a do not cross sign there. His bedroom really is off limits. The minute you step into his bedroom, loud alarms sound and Disney cast members come running to see what all the commotion is about. They then will discover you standing there half in the room, half out of the room without your clothes on and they will not be PLEASED at all.
It is a far better idea to take your “naked” photos in Minnie Mouse’s house, which is right next-door. While there are loads of very small children traipsing through, there are no alarms and thus you have a far better chance of actually getting naked, having your niece snap a quick photo, and moving along to the next attraction without creating a spectacle! [naked photo]
Update: After closer scrutiny by BoingBoing and others, nakedjen's naked photo at Disney World appears to be a fake. Oops. Funny what we'll do for a little link love.
Update 2: After examining every inch of Jen's naked photo taken somewhere in the suburbs of Washington, D.C., this naked photo appears to be authentic; nakedjen is cool.