My wife returned a book that she ordered from Wal-Mart online. She had the receipt and everything she needed for the return. However when it was scanned in, even though the item was clearly marked on the receipt, the computer did not understand it and kept saying her book wasn't on the receipt. It took over 15 minutes for a manager to come over and solve the problem. You'd think a manager would be posted by the returns counter, by alas no, that would be logical.
Oh, and I don't know about just Wal-Marts in general, but there never seems to be any hot water in the bathrooms at the front of the store.