While we can't unasshole everyone we can start ticketing ppl who park outside the lines. In most cities there's traffic wardens anyways, so that should be cheaper than installing bumpers on every parking spot.
Yes, though the other reason to have bumpers is physical safety. This is a walkway. If someone is just a little bit negligent, they could run over someone. Ticketing them doesn’t help at that point. And the cost of that life is more than a million bumpers. So again, as much as I’d like to punish bad parkers too, as emotionally satisfying as that would be for me, the practical solution that will just work is to add the bumpers.
I have never seen these things in my life. Apparently they are not a thing where I live. But it's sad that we need something like that so that idiots learn to park.
I have poor spatial awareness and learning to drive later in life - plus still getting to know my car. With a long, low nose, these bumpers are so handy, particularly the lower ones and/or made of rubber, so I don't scrape my car's poor snout!
After a while you just get used to the fact that your license plate is going to be bent at the very bottom if it doesn't have a plastic holder behind it.