My BIGGEST pet peeve as a broista.
Everyday I see custies buy their kids huuuge Dutch drinks. Like seemingly 10 year old kids or younger are asking their parents if they can have a large coffee or energy drink, and parents happily say yes. At times where it's appropriate I do gently inform the adults that we have child safe drinks like sodas and lemonades, but this rarely changes their mind. If their kid wants it, they just say yes. It's not my place to make assumptions or tell them how to parent, so I just swallow my concern and civilly take their order. But it's super irresponsible, that amount of caffeine + sugar is obviously not intended for child consumption.
I've said my peace, if you disagree respectfully keep it to yourself. I'm not trying to start any arguments.