This is a tough one. I definitely see your point, Nikki. It is messing with a historic object, even if only temporarily. There's something inherently wrong with that. On the other hand, this is Disney we're talking about. In
Disneyland, they do a whole holiday overlay for Small World and convert Haunted Mansion to Nightmare Before Christmas. They have redone Cinderella's Castle how many times now, including the infamous pink birthday cake for the 25th anniversary. I'm sure we could list plenty of other times they "defaced" a classic item in the course of a promotion. Personally, I have a lot more trouble with them making permanent changes to POC by adding Jack Sparrow to a classic attraction. The plane thing is easily reversed when the promo is over but we're stuck with the new POC long term.