Even though Target gave this family a full refund, that might not always be the case which doesn't help.
Years ago, Bed Bath & Beyond had their gc racks out in the open making double dipping an option. Buy a specific discounted gc elsewhere and then use it at BB&B to buy another discounted gc. Then they moved the rack behind the cashier's, if you wanted one you had to ask for it and during purchase the cashiers watched you like a hawk preventing double dipping. After this change, I don't recall anyone posting their gc were drained which leads me to this Q.
If you had the choice what would you prefer; gc's in the open or behind a controlled counter?