Los Angeles has reached peak bumper sticker: It’s now common to see cars displaying a rainbow of decals. Today’s stickers often mimic classic formulations from bumper stickers past and declare loyalty ...

“You know how it is when you’re driving behind a car and you notice the bumper sticker, and you think to yourself ‘Oh, it’s that kind of person’ or, ‘Why would somebody put that on their car?’” Walter ...