Well, in the UK there is a quite well-known store that pays customers money if they donate their used clothes to a charity shop. That store also has a generous returns policy. So there are people who go through the charity shops, buy all the clothes from this particular store, and take it to a store to get a full price refund. And if the sales people who have seen it all refuse a refund, they ask for a manager and shout at that manager (usually a stupid, inexperienced kid of twenty years) and get their money.