I love the ideas here, speaking as someone who never felt okay being the slutty Halloween costume. Too tight too short too much boobage? No thanks. But this is a fun list, with some good suggestions, particularly for those who shop at Goodwill and Hot Topic for their costumes.
Unfortunately, the other commenters are unusually dickish for io9. It's mean-spirited, which is something I haven't seen there in a long while. Help me drown them out, GTers!