The avid duct tape costume pro would actually create duct tape fabrics and then use the fabrics to tailor a form fit suit or costumes:
Nope, not for me. While I went to the bookstore looking for a book about duct tapes, the store clerk asked me whether I was an art student of sorts. It took some convincing for her to believe that I was just being creative and eccentric. Just look at these people:
More costume can be seen here and here and the tape is also featured quite often here.
I guess you've got to be just a bit crazy to create a costume out of duct tape. It'd be a lot easier to convince people that I'm a psychopath and just buying tapes for easy disposal of a body or two. Well, I'll keep some leftovers. Who knows? Right?