I had a similar experience a couple of years ago, pre-
HST▸ refurb anyway. A senior citizen (read "old bat") was travelling with her daughter and granddaughter in three seats of a table. They had piled their bags up on the fourth seat and also dumped an enormous bag at a table across the aisle from them, taking up two more seats.
This was a reasonably busy train. I asked the people sitting across the aisle if they minded me moving the bag into the luggage rack (having not twigged that said bag did not belong to them but the Old Bat). They said fine. I started to pick up the bag (which, incidentally, was not only vast but also hideous, with a two-foot-square picture of an ugly baby's face on it). Old Bat pipes up "Excuse me, what do you think you are doing?". "I'm moving this bag to a luggage rack so I can sit down". "You can't do that. It's my bag and I want it to stay there".
At this point, Old Bat's daughter and granddaughter were both looking at their feet, apparently willing the ground to open up and swallow them. Me: "This is a busy train, I would like to sit down and your bag is taking up two seats". Her: "I don't care. I want it to stay there. (Announcing to the rest of the carriage, by this point)
It's not my fault that his @rse is too fat to sit down on that seat".
At this point, I should probably point out that I am 6'1" and barely 13 stone. I could legitimately be accused of many things, but being fat isn't one of them. Old Bat was blessed with, shall we say, a rather ample figure. Savour the irony folks. Especially since the Old Bag's ugly bag-based behemoth had left about 6 inches of seat width between it and the window. An anorexic stick insect with its jaw wired up would have struggled to fit in that seat.
Me: "I'm quite happy to put the bag in the rack for you, I'm not asking you to get up and move it". Old Bat: "No, my bag is staying there". This impasse was finally broken when I got slightly theatrical and growled loudly "Under the conditions of carriage you are not entitled to leave luggage on seats to the exclusion of a fare paying passenger unless you hold a ticket for that seat. Shall I go and get the conductor so he can charge you three extra fares for the seats your bags are currently occupying?".
Old Bat: "Mmmph".
I moved the bag (the Bag's bag...?). She finally shut up. Although every ten minutes all the way to Bath where she mercifully got off, she complained briefly but loudly to anyone in earshot who would listen (i.e. nobody) about the rank injustice of me moving her bag to the luggage rack.
Silly old witch. As an entirely incidental observation, I've never had any grief from shifty-looking yoofs ever. The rude passengers in my experience have
always been recalcitrant pensioners. However, I wouldn't seek to make any such coarse generalizations...
Here endeth the lesson. If you're still reading, well done. A few glasses of wine seem to have made me rather verbose.