The law of unintended consequences still applies, though. At the LAXative, it used to be 4 quarters to get one of those luggage carts, and people still left them wherever they got done with themI have always tried to give my cart to somebody on their way in - doesn't matter if I rented it or found it.
If there is nobody around or nobody that wants it, I take it into the store, lock it up and get the quarter - doesn't matter if I rented it or found it.
I have never considered this a moral issue before - interesting.
The unintended consequence was the area became a magnet for homeless people wanting to take the cart back for the buck. Definite rise in the creeper population density