I talked to a guy who used to run a grocery store. There were low-income housing apartment buildings nearby. People would walk to the store, buy groceries, and then just roll the damn carts back to their buildings down the street.

Sounds terrible but the owner didn't mind, or at least didn't discourage it. Those people didn't have cars and if they had to carry groceries home by hand they'd just buy less groceries or perhaps not shop there at all. He would just drive a pickup truck to the apartment building at the end of the day to collect carts.

When he began the story I thought it was about to be a racist story about "low-income" people (bit of a barely-disguised dog whistle there) but it wound up being pretty cool. An ad-hoc system that worked to everybody's benefit.