Originally Posted by
SF_EU
My family and I were seated in Biz trans atlantic and a family tried to do something similar to this (but they did it before take off, rather than mid flight) - the purser caught it during their pre-flight check... it delayed out departure because the lady WOULD NOT go to her assigned seat and wanted to argue... The Captain finally came out and said, you have 10 seconds to move to your seat or I'm cancelling the flight and you're going to jail...
Honestly, like others have said - it's a hard no.. and these days, flying is like dealing with a thousand little emperors - from sidewalk to sidewalk, you have to deal with every little authoritarian guarding their little kingdom - they have to do something to make their job tolerable (i don't mean FAs - you guys are great)... BUT... a little sugar with the flight crew 'can' go a long way... give it a try... what's the worst that can happen? (but don't argue - or you'll likely be met at the arrivals gate by the police... lol )
Being pleasant during exchanges with the crew is a given, but in this case having two passengers over 2 in one seat is expressly against carrier policies and also just plain unsafe so as you said it's a hard no, so why even "give it a try" in the first place? Maybe I am misunderstanding the second half of that last paragraph.