Another rule - The Handicappped parking space is not a cart coral. Do not leave your empty cart in the handicapped space. And if you are lucky enough to not need the Disabled space and you see a cart in the middle of it, do the next handicapped person a favor and move that cart.
It is acceptable to leave one or two carts near, but not in the middle of, the handicapped space. Some slighty handicapped folks may use a cart like a walker.
(I did 3 months on crutches years ago. I used the cart-as-walker many times. I was not eligible for the handicapped space.)