Ah, I don't return the cart, ever. But that's because I don't have a car, and never use a cart to begin with. I only shop for what fits in the little hand held baskets at the grocery store, which I do return on to the stack I grabbed them from on the way out the door. Even though the employees look at me like I'm trying to sneak an unpaid item in there, to grab out after I restack the basket.