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Hey old people on Hexbear, remember those "Don't Worry, Be Happy" stickers, buttons, and so on?
(hexbear.net)
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:
They seemingly vanished off the face of the Earth, and good riddance.
Or truck nuts.