My experience was that most people don't. I wore some Little Mermaid themed ears I'd gotten off of Etsy on embarkation day, and to dinner that night. Much to my surprise, almost none of the CMs had any idea why I had a fork (dinglehopper) in my mouse ears/on my head. They thought it was the oddest thing, and kept asking me why I had a fork on my head. By the second day, I'd grown tired of wearing them, answering the dinglehopper question, and felt out of place wearing my ears, not to mention they kind of got in my way running around the ship, that I stopped wearing them. I was so bummed because I expected to wear them a lot more than just a few hours, like I would've in the parks. Oh, well. I might wear them again next time for embarkation. I haven't decided yet.
