So, so many; I have spent far too long in hospitality.
A relatively benign one: At a small coffeeshop. Found a quirky little hat behind the counter - a tweed fedora thing with a rakish orange feather in it. Full of youthful high spirits and caffeine, I proceeded to lark around the shop in the hat (yes I wish I still had that much energy), much to the amusement of my coworkers. A lady walks in, interrupting us. She'd left her hat.
At a bar: A nonzero amount of customers buying a bottle of beer and then pouring it into the tip jar (edited to add: thinking it a glass for their beer). Some version of "how was I supposed to know?!", repeatedly. I don't know, maybe the fact it was covered in chalk pen, contained money, and was very, very ugly?
At a pub: boomer getting very angry at me because he'd asked for a spiced rum and coke and I'd offered Sailor Jerry's (cheapest). Apparently that was a wussy drink. No, he clarified, a girly drink. He chose some other rum with coke. Yeah drink your sugar water old man.
Hear, hear. Something that comes close to to how I feel about us killing our biosphere is a quote from Paul Ehrlich: "What we're losing are our only known companions in the entire universe".
I am so enchanted by all of the weird little lifeforms we are supposed to be sharing our world with. All their amazing intricacies, beauty, and evolutionary history. All of it (but especially birds! Birds are my favourite). It's so alien to me that people don't give a shit and, to the detriment of everything else, only care about looking inwards to other humans.
That was a ramble! Quite sleep deprived and loopy over here.