DUDE. How fucking hard is it to grab a razorblade, remove your old registration sticker, and replace it with the new one? It blows my mind when I’m sitting in traffic behind someone with either a stack of stickers piled on top of each other, or even worse, a rainbow of fucking stickers across the top of their license plate. Are you fucking retarded? I think the instructions are printed on the plastic wrapper the sticker comes in (similar to this one courtesy of the fine folks of Wisconsin).
Why take off the old sticker instead of putting the new one on top of it? NEWS FLASH – People STEAL those stickers. When they are stuck to metal, they rip apart when you try to get it off…when its on top of another sticker, they can get it off in one piece and use it on their own car!
Just do it.