Why not go dressed up as Virginia tech shooting victims? Sounds like a great way to be creepy. (Showing up as a dead victim of a madman...hmm, those were always the coolest costumes when I was a kid...like a "Jason" victim or a Freddy Kruger victim...or a Ted Bundy victim....with great makeup too.)
I have a dark sense of humor so I like these types of things...For instance, if someone close to me dies in a gruesome way, you had better believe I will make jokes about it...not to make fun of the dead person...but to make light of the situation...I sure as hell would want someone to do that for me when I pass on, so why wouldn't I do it for others?
Also, dressing how you want to falls under freedom of speech...as long as it doesn't break any indecency laws...(Being partially nude in public, etc.) In other words, those people are protected by the Constitution to dress however they want. Hell, they could even dress like that year round and still not break any laws....as far as my personal view on it? I think that dressing like that should be left to only the family and friends of the victims if it is supposed to be for humorous purposes...it would be weird for a total stranger to do that to one of my family members or friends.
Here's a better costume...why didn't they dress up as the shooter? (I don't even know that douche's name...)