That's fucked up beyond belief. How can you expect people to act nice before they get their morning coffee? That's just not possible.
I don't care how early it is. No one should EVER be rude to baristas/retail workers/servers/etc. They are there to help you, not to be your little bitch-fit target. I'm passive aggressive therefore I give them decaf muwahahaha!
>does job purposefully wrong because of emotions
Yeah it is what it is. Humans are emotional creatures, so I don't feel too bad especially since I rarely do it.