Hunger, fatigue, general negative state of mind maybe.
This particular guy was a contract worker who came in for an early lunch, so I assume they'd been working for some hours before they came in.
Generally the blue collar worker dudes and the after church crowd were the meanest with the least tolerance for mistakes.
He said he is free to use it how he wants and you said he's free to use it how he wants. Weird disparity in votes for that one.