I was once accosted whilst on a nightstop by an angry pax shouting at me that my airline was rubbish. He was quite threatening and I had to lock myself in my room and call security.
Very similar thing happened to me once. All our pax bags had been left behind in ALC due very hot weather and maximum take off weight restrictionns. The pax knew and they, all 215 of them, crowded round the baggage office, trying to get in and over the counter! Had to get customs and the police to remove them! Very, very scary for me. I hadn't even been with the airline six months!