One of my absolute favorite Halloween costumes was worn by my-daughter-the-Goth to high school. As she wore black and all the accessories to school every day, she said to me thoughtfully "a vampire wouldn't go to a costume party *dressed* as a vampire, would she?" I said, no, of course not.
She went to school as a white bunny. Bunny ears, white clothing, white face with whiskers painted on, basket of carrots and a box of Trix.
Cool. (I think she may actually have frightened them more as the bunny.)