Originally Posted by 
p38arover
				
			 
			And the problem is?
You get the money back when you return the trolley. 
I've seen people steal trolleys and put them onto trains to take their shopping home.   I see them take them home, empty them out, then push the trolley out into the street, a long way from the shop.  I see them dumped in the local creek.  I don't blame the supermarkets for wanting a token.
Aldi offer a key ring token which can be used instead of a gold coin.
(No, I don't shop at Aldi.)
I'd like to see more of the trolleys that lock their wheels when people try to take them out of the shopping centre car park.