I rarely see DZ stickers on cars in the DC area, so when I do, it's usually someone I know. There are LOTS of AKA stickers on cars around here..those are the ones I usually notice because we share the same colors.

Anyhoo, I have a "euro" type sticker with the greek letters DZ on the back of my honda passport. I haven't seen a cool alumna sticker in a while, otherwise I would have one of those.