Juxtaposition Said:
if you have friends to hang out with and don't abhor dress clothes or the moronic plague that is your school, there's no reason not to go. but it never hurts to have a possible back up plan in case the whole thing sucks.
Word. Hell, you can always just make an appearance, and if it sucks have a little afterparty with your friends.
I used to really enjoy dressing up, and wore my own suit to prom. It's sad how many teenagers don't own suits. Anyway, if nothing else it's a great excuse to buy some formal wear, and get yer hair did!