Have you ever been told off by ticket checker on a train for listening to music?

No. But I’ve been told by mall security that listening to music on the built in speakers of my device wasn’t allowed. Well only for me. Because he passed several people who had speakers blasting and didn’t say squat to them. Nor did he say anything to the skateboarder who was riding his skateboard ironically right next to a sign that states “no skateboards, bikes or scooters are to be used on the premises”. Oh but it was ok because he knew them.