I’ve always thought it would be fun to print out a bunch of stickers with sayings like, “I suck a driving,” and slap them on shitty drivers cars. The main opportunity I see for this is when you are trying to cross the street and a car is pulled up in the sidewalk, forcing you to have to walk behind their car. As you are passing you could slap a sticker on their trunk. I think it would be a funny thought of them to find that later and realize they have been driving around all day or week with that thing.