I went to one of these at a new campground that was being built....I said no thanks and the salesman left the room to get reinforcements and I got up to leave and low and behold they had reversed the door knob and the lock was on the outside and we (my wife and two kids) were locked in the room....I threatened to break the door down if they did not let me out so some one did.....as a form of protest I stood in the parking lot and told other "shoppers" what had happened to us. Seeing them get back in their cars and leaving gave me a sense of getting even.....