Never. No how. No way.
I’d move. No problem.
To First Class with a voucher for 2 more free tickets.
If they don’t comply - they can KMA
I was on an international flight where such a request was made, and I was one of the people that was asked to move. I said no.
I will move so that a mother can sit next to her young child. That is the only reason. Otherwise, if a person doesn’t like me, they are the ones that need to move. And if I catch on that they don’t like me, they had better move, or they won’t like their flight much.
It's the carriers home, they choose who they allow on and off, and they don't need a good reason to boot somebody off "to the next flight" or similar inconvenience. I'd ask for a first class seat, but passengers are at the complete mercy of the crew.