I can't answer all your questions, and I'm not a lawyer.

A couple of my viewpoints:
- When you buy a lot of stuff and then return it....you add to the stores overhead. Be responsible in your shopping....

- You buy something on sale 1 week. It costs $200. You lost your receipt, and want the store to give you a giftcard for the full $300 regular price. See where the store is losing? And yet you knowingly made the purchase while the item was on sale, thus you are profiting from the return.

- Another scenario: You buy a shirt that costs $40. You switch tags with another purchase that cost $20. Again, you are profiting $20.00, and the store is losing $20.