I’ve never been physically forced out but I have encountered this sort of thing when traveling solo, usually suggested in a vaguely deceptive fashion that attempts to make an objectively worse seat somehow sound better than the one I’d be giving up.
I've not experienced this in re: transportation seating, but I have experienced it in re: hotel room assignments. In fact, this particular thing is one of my notorious "war stories" in re: my "Hospitality Industry vs. the Solitary Traveler" struggle. Will post in a different thread if you wish to hear it.
Even on 10+ hour flights in business class couples and families have no qualms expecting solo travelers to give up their carefully selected seats just because they’re experiencing buyer’s remorse. Seats that I booked and bought specifically because I cared where I sat.
Screw that noise. First come, first served; if you’re old enough to book, you’re old enough to pay attention to what you’re buying. If you didn’t like what was on offer then find another flight. If you had to travel last minute and didn’t have much to choose from...join the club. We’ve all been there and we’ve all suffered the consequences of last minute travel.
Precisely my position on the subject. I know that sounds cruel, but hey Is my comfort any less valuable than a couple's comfort solely because I'm solo?.... Now, that said, again it depends on where the couple have their seats. If, for example, the switch would result in me being in the same row, with a window, etc. I would do it. It also depends on the demeanor of my new seatmate. If s/he would be one of the two people I just refused, leaving them pi$$ed off at me (usually the male), then I might elect to move to avoid a rather nasty 10+ hour flight. So far, I haven't had to do that. Most of the time, someone usually got upgraded and took the seat next to mine, nullifying the issue.
I’m not sure why it’s so difficult to understand that one person sitting alone is not the same thing as one person taking up two seats.
And, although it has happened a precious few times, I have never expected to have the adjacent seat to myself, and I never sprawled onto it in advance of the flight departing. That's because, more than likely, if the seat next to mine in CO's Business/First were still "available" at departure time, they'd usually upgrade someone from coach. The "Business/First' cabin would almost always be completely full on each flight.
I’ll happily fund the ACLU lawsuit that exposes and litigates this kind of selective application nonsense.
So would I. I mean, I know the Service crew knows who their "regulars" and "high roller/VIP's" are, many by name, as I discovered. And I know they're going to take care of them. And, as long as it doesn't result in a disadvantage for me, I'm fine with that. But if it means I lose a meal choice, or i lose a window, fughedaboutit!