They must have been the most commercially successful bits of toxic positivity merch I've ever known. Back when they were a thing, your chances of getting in a road-rage based auto accident spiked each time one of these was on the back of a vehicle in motion:
Show
They seemingly vanished off the face of the Earth, and good riddance.
I'm not particularly old but I swear I've seen this in person when I was in Mni Sota Makoce.
It was probably the sum of
assholery when boomers were in their 30s and starting to feel not quite so invincible and young anymore and made it the world's problem.