I don't understand Disney's thinking on the character wraps. You had better believe that couples are going to be joining the 30-foot-high club inside of the gondolas. All the wraps will do is provide additional incentive.
With family members who have worked in the parks, and experienced these things first hand, I can tell you that couples have gone at it just about everywhere you can imagine. CMs have had to do everything from make PA announcements on Pirates of the Caribbean ("You know we can see you?!") to remove used condoms from the Swiss Family Treehouse (listening to bands wasn't the only things kids were doing on Grad Nights/Nights of Joy)!
Windows aren't the only thing you'll need to worry about Disney cleaning!