Looks like it's time to test the waters of Lemmy. This one has generally gone over poorly on reddit every time it's come up, so let's find out how it does here:
What about people who have a high degree of difficulty getting around? A good friend of mine has a herniated disc and a bunch of neurological issues as a result of a car accident he was in, he walks with one of those rolling walkers at a very slow speed grunting and groaning the entire time, and that was at the best of times. He barely manages shopping by using those electric cart things, but with all the reaching and bending he has to do, by the time he got back out to the car he was sweating like crazy and in obvious pain, even with my help. The idea of expecting someone in that situation to endure another couple minutes of horrendous pain just to make someone else's life very slightly more convenient by bringing his cart back up to the store even from the handicapped parking spaces strikes me as absurd, but he can't always get help with his shopping so I know he has to sometimes.
I think rules, written or otherwise, should have exceptions to account for extreme circumstances like this, but a lot of online people just go 'No, if you don't bring your cart back you're a BAD PERSON no matter what!'.