I've had 2 of them stolen from my car so far.
Maybe, maybe not.
Make sure you remove them before going through the car wash; a lot of folks forget to do so and those rubberized magnetic sheets aren't all *that* strong.
I have a firearms-related vanity tag and a sticker on the back of my car.
Nobody messes with it, and I even leave stuff on the seat sometimes.
Buy 'em in bulk and give them away to likeminded friends.
Let's drive them crazy with patriotism.