I don't think so...many people decorate their windows for the holidays, so why not for your holiday at WDW? When we were there at Christmas, I put lights around the sliding door, static stickers on the glass, green Mickey shaped heads with Santa hats made from craft foam and had a mini tree in the room. I've read of others using those gel stickers...not sure if that is the correct name and other items. I found many of the items at the dollar store so when I was we left I could just discard the items and have more room for goodies to take home.
Have a great trip!
