I’ve never had them stolen myself.

In PA, when they used to still use them, they had little wedge shapes cut into them when you got them, so once you put them on, they couldn’t be removed intact.

Because they couldn’t be removed, you’d see tons of cars with the corner of the license plate cut off.

Pennsylvania finally stopped using the registration stickers a few years ago.

No point to the registration stickers anymore anyway. The license plate scanners already know everything about you.