They might already exist, actually. I know that a couple states do tamper-resistant stickers for the windshield registration sticker. It doesn't really make s

They might already exist, actually. I know that a couple states do tamper-resistant stickers for the windshield registration sticker. It doesn't really make sense, though -- those are on the inside of the car, they're comparatively quite large, and they're a royal PITA to take off already due to the strong adhesive they use.