I usually try to point it out politely.
That being said though, the majority of time I'm ordering food (so such a situation pops up) is at the college cafeteria (I'm not taking classes atm, but I show up for clubs) and between all the yammering students and the workers moving equipment around it's rather noisy, making me have to speak more loudly be heard at all. So it is possible that for certain individuals my raise my voice just high enough that they get defensive.
Though, I only have one suspected case of this happening.
I used to frequent a Harvey's at Campus (I stopped because of what's about to follow), and it was all fine for about 2-3 years.
Then they got this one new person, and every time I order there she always gives me this look. Not aggressive or anything, but just a look, there's no emotion to it, just it being obvious her eyes are straight at me.
At first I thought nothing of it, people something just look in odd places, sometimes eyes wander about. But then I noticed a pattern... My Poutine would start lacking it's fork, every, single, time. Sometimes I wouldn't catch this until I already crossed campus and got ready to eat in the club room. Also she always takes her time preparing food, the line was be building up to be a dozen people, and she's still walking at the slowest and more leisurely pace that I've ever seen someone move at. So ultimately after enough incidents of this happening and having to keep an eye on what she was doing and 'remind' them about stuff like forks (and in one instance a drink for a combo) I decided to just speak with my wallet and stop going there.
"Gwazi, why not just call her out and complain?"
1. I'm not so passive as to never request anything. But I am passive enough to not cause hostilities over something so minor.
2. I'm not 100% positive if it's intentional or if there's an element I've overlooked. And if so, the last thing I want to do is to put someone on the spot and/or endanger their job.