These costumes cross the line of decency even for the open-air slutfest that Halloween has come to be. Based on these get-ups, a good Halloween costume is one that either simulates some form of sexual depravity, or presents a lighthearted recollection of a particularly tragic moment in history. Remember, if your friends aren't ashamed to be seen with you, you didn't try hard enough.

Updated 10/25/11:

That's a lot of wasteful packaging for nothing more than a fake mustache.