Yeah, they do get some stolen, and also some of the bed scarves go walkies. When the Royal Rooms first opened they even had some of the themed bedspreads go. And one of the small padded bench seats (the Beauty and the Beast 'enchanted dog' themed ones) was found in a parking lot where someone obviously found they didn't have room in the car to steal it.
They have a very limited stock of spares to replace these items (and also some will presumably have to go away for washing) but as far as I know they as still standard accessories for the rooms.
Oh, and alarm clocks are definitely being switched over to being "request" items at the moment. They have recently noticed that a lot of were unplugging the powered clocks anyway to plug in USB chargers for their phones. Odd really, as there's a spare socket there behind the bedside table anyway (which I plug a 4-way power strip into, and I leave the clock connected). But they are monitoring how many people are requesting them (I know we will being doing so).
Andre