The teenager sitting opposite my first class reserved seat with his feet on my seat, and the reaction on his face, when I kicked his feet off my seat, and rubbed his face in my soiled seat and called him all the names I could think of from my oil and gas industry vocabulary followed by my throwing him off the train. To say that he squirmed and was near to tears and had no idea how to react gave me much pleasure. My only sadness was that afterwards I regretted that I hadn't used more of my vocabulary to express my feelings and that I hadn't kicked his backside with my soiled shoes when ejecting him from the train.
When the train "manager" or whatever they are called these days came to inspect my ticket I told him of what had happened and advised him to check the CTTV coverage of what had happened.
To be honest, I get very Pee-ed off with how some people behave on trains. People who sit in an aisle seat to prevent someone sitting next to them or put their belongings in the seat next to them to stop people sitting with them. I now get great pleasure in asking these people if they have paid for 2 seats, and I love their reaction when the whole carriage hears of their atrocious behavior. I ask them if they are too ill or infirm to put their luggage in the overhead luggage trays and if I, a 60 year old man can assist them so I can sit next to them. I love to tell them "yes be embarrassed - it's what your selfish attitude deserves". "go on so I can continue your being embarrassed by your self-centred attitude, and I really love rubbing it in by continuously asking if they are happy with me sitting next to them.
Yes I am a bit of a "B" in my dotage.