Stickers are the worst. They can't be painted over like spray paint. They get brittle as they age. Removal requires a human with a razor blade and some shop cloths and minutes of time
Edit: and good luck preserving the surface if it's old, soft, or already overpainted.
Or a few seconds with a 3000 PSI power washer and narrow fan nozzle. Though doesn't work nicely indoors.
It's the advertisers who are the problem. They're the ones dumping their garbage on us, reaping the benefits and then expecting us to clean up after them. Wish someone would just drop the banhammer on the whole industry already.
Fuck it, let's kick the can like we mean it: I blame the dinosaurs who died and turned in to oil.
However, aside for that aside, that's not the actual culprit. The real culprit is the Big Bang. Or as Carl Sagan put it: "If you wish to make an apple pie from scratch, you must first invent the universe."
Or some solvent and 30s of time.