I work in a petrol station, so most of the retail things already mentioned apply, but there's a few specific to my job.
- People using mobile phones or any electronics near the pump. There's signage everywhere that says not to do it. And when called out on it, they mention Mythbusters proved it wrong. Guess what people? I love Mythbusters and only just watched that episode recently. It doesn't say what you think it says, and they took it back in a later episode anyway.
- People speeding through the site. Do you drive that fast through a shopping centre carpark? If not, why do it where there is potentially explosive stuff everywhere?
- Giant price board says ATM. Front door says ATM. ATM has a sign near the roof above it that says ATM. Have never seen a petrol station in Australia, including the outback/country-side, that doesn't have an ATM. "Do you have an ATM?"
- "Do you accept this card?" There's a sign right near the door that lists everything we take.
- Anyone arguing to me about the price of fuel, as if I get to choose it. Usually shut-up when I mention that I don't get a staff discount, drive a V6, and have to take a 40 - 45min drive down the highway from the next town over to get to work.
- This one can't be helped as much, but some people, especially foreigners (particularly you Americans) refer to their petrol as 'gas'. We actually have a product called Autogas / LPG Gas, and it's not the same. Especially difficult for me when there's someone who has actually filled gas.
- "I don't know what pump number I am"... sometimes I want to tell people to go back out and look while I keep serving other people.
- Asking what cigarettes we have (lots of brands), what price they are (Australian laws dictate we can't put prices on our shelves, so I have to scan every one indiviually), asking if they can see the cigarettes to decide (again, laws prevent that, and they all look the same because of 'plain packaging' law), asking how strong / what milligrams they are (again, laws removed that). I don't smoke, the customer clearly does, so they should know what they want. Basically Australia cigarette laws suck more for retailers than the people they are supposedly trying to encourage to quit.
- Another cigarette one, getting the "Some cigarettes please", with no mention of brand, 'flavour', or packet size, or only part of the details (ie. size and brand, but not 'flavour').
- People assuming I'm somehow psychic by not telling me what they are there for (cigarettes, paying for fuel they put in while I was serving someone else / looking somewhere else, carwash etc).
- Too many more to list after doing years of this lol.
A lot of stuff I get annoyed at might seem petty to some people, but I've dealt with most of these things literally over a hundred times.