Yes, cry about a business making sure you PAID for the items you chose. I know the DUmmies want everything for free, but Walmart is a business and employs hardworking people that they (Walmart) must pay. It's not like the wages for the worker's just appear out of someone's ass.
Our greeter's at our Walmart are very nice and never "harass" us with checking our receipts. Probably because we make numerous trips to Walmart when the same two greeter's are working. They know us.
Sam's Club does the same thing. They stop you at the door and make sure your items purchased on your receipt matches the item number in your cart. It backs up the door when you're trying to leave, but I'm not in that big of a hurry if I went shopping at Sam's.