Given that the exact same question is the current top post but for driving instead of transit, I feel this question was needed.
My answer: I saw some guys hooking up a Raclette Grill to the outlet in an otherwise empty German intercity rail waggon. They had it unpacked in one of these 4 person seats with a small table. No idea if that could work or if draws too much power from the board net. I just headed on to the next waggon.
Pretty mild but some guy with a box wine was harassing me the whole time he was on a coach bus. During a rest stop the driver saw me and asked if he was bothering me and I said yes. He said I could’ve reported him sooner and he’ll deal with it. Never saw box wine guy ever again.
Also, on a separate trip, dude got on and immediately took his shoes off and stunk up the whole bus. Legit forgot what regular air smells like.