I knew a guy that had a roll of custom-printed “I park like a jackass” stickers. They weren’t very large – I think they were originaly labels for folders or something.

But they were on tamper-proof stickers, the kind that were metalic and broke into a bunch of tiny pieces when you tried to peel them off.

He’d slap two or three of them on the driver’s side windshield and window out of the main line of sight, but you couldn’t miss them when driving.

They’re a pain in the ass to get off. I know, because he put one on my car that said, “I lick sweaty ballsacks”.