My worst "seat story" was when I reached my row, where I was ticketed for an aisle seat, and found PoS's (Passengers of Size, as they're quietly referred to in the airline industry) sitting in the aisle and window seats. And when I say "size", I mean GIANT ECONOMY SIZE.
The female, without actually looking straight at me barks, "Go sit somewhere else. My husband isn't moving." Okaaaay, at that point I certainly don't want to push the issue and spend six hours smashed against the window, so I swim upstream to find a crewmember and explain my problem.
Which I do.....and she barks at me, "Just take another seat!" I ask, "Which seat?" "I don't know what's available; take a seat and we'll straighten it out."
So, I take a seat in the back and the person whose seat it was immediately shows up and barks at me to get out of his seat. Take another seat....same thing happens. For the amount of barking I'm receiving, you'd think I was on an AKC charter flight to the Westminster Dog Show.
I decide to just stand in the back until it's clear which seats are actually unoccupied. I immediately get barked at by another flight attendant, "Take your seat! You can't stand there!"
At that point, I about lost it.
I finally got a seat, even another window seat at that, but I'll bet if I had insisted on my original seat and persisted or there had been no other seats available, I would have been the one kicked off.