Enjoyed your article concerning shopping carts.
A small town in Peru, Ind., has a grocery store that has a device on the shopping cart that requires you to insert a quarter before it releases the cart for your use. After you use the cart you return it to the cart line and plug it back into the cart ahead of it and that releases your quarter.
In this community you see no carts in the parking lots and none floating around town. If the adults won't return the cart, children in the community are eager to.