If there’s anything I dislike, it’s being wronged for something I didn’t do, or people trying to pull a fast one on me.
When I was a prefect in Secondary School, we were not allowed to bring food and drinks back to our classrooms. I spotted this guy trying to sneak a drink and I nicely told him to consume the drink in the canteen. He went back to the canteen and I later happened to spot him attempting to leave the canteen by a different route.
Being sufficiently annoyed, I tracked him to his classroom and promptly booked him for that “offence”. He was similarly annoyed that I actually bothered to track him down. Well, I was just doing my job that day…