I've decorated my door on my last 3 Carnival cruises, and no one has ever bothered them. First time it was over Halloween, so I put a bunch of pumpkin and leaf cutouts. I used the same decorations on my last 2 (just got off the Glory on Saturday - want to go again!!). I went to a party store and got some big (18 inches) fish and put 2 of those on and a sun that has one of those center crepe paper like things that opens up and makes it 3D looking. It was always easy to find our room, and we got a lot of favorable comments.