I just saw an article where some woman's kid got some shit on the rug and she took it back to Costco for refund. No shame. If everyone did shameless shit like that, Costco would have to hike all prices. The article mentioned some other internet asshole taking back a half eaten chicken bake and completed Lego art set.
Reminds me of times at McD I'd be waiting for my food and see some loser taking back a burger because it's not up to his standards and it gets dumped and replaced no extra charge.
At Sam's soda machine, I once saw this handicap old guy repeatedly filling soda and dumping it over and over and sipping in between. If that were my store, he'd get permanently banned.