this, especially when they come up with the excuse that they didn't see the sign for first class, its easy enough to tell whether you're in first class because there's towels on the seats :moo:
Young children who repeatedly ask their parents when the train is going to leave the station, it's okay a few times but eventually almost anybody would get tired of a high pitched voice whining the same thing over and over again, maybe I'm just a bad person
People who run on to the train like a scared deer without checking where it stops and not realising that the there is one that stops where they need to 7 mins later and then getting annoyed because the conductor isn't able to stop the train when they find out the train isn't going to stop at...
also when people run for trains just as they are about to leave, people blowing whistles and signalling to the driver, not realising that there is a train 5 minutes later, and that they're delaying the train which means they're holding everyone up.
when people turn their nose up at the food trolley thing, until someone else uses it, then the whole carriage perks up including people that the person doing it has already passed, blocking up the carriage for *****ing ages