I work on trains. These are all things which irritate me. I am however in a position to do something about them:
"Can you put some headphones in, please? The other passengers do not wish to listen to your music/Peppa Pig"
"You don't have any headphones? Then kindly turn the sound off"
"Feet off the seats, please"
"We are busy today; please remove bags from seats, or they will be charged a child's ticket"
"Please put that mask on properly"
"Can someone please vacate a priority seat so that this lady can sit down?"
"Please moderate your language"
"Put that fag out!" (I once chucked a pervy man off at 1am for lighting up. It was in January)
"Please put a shirt on while sitting on the upholstery"
And my all-time favourite:
"If you don't have money to purchase a ticket then I suggest that you walk. Now please step off the train"
I'm ruthless where anti-social behaviour is concerned.