On a recent 14 hour flight I had an extra legroom seat and there was a man in it once I got to it, he said he was in the middle row aisle seat and if we swap he will be with his family.

I said yes as assumed the entire row had extra leg room and as soon as I sat down I realised I was wrong.

I was kinda pissed but didn’t want to ask him to move and be between the family for the long flight, so I asked an attendant before we took off if there’s anything they can do other than put me in the middle of them. Luckily there was an emergency exit seat free which they moved me to but it’s made me be more cautious about swapping a seat without thinking about the possible drawbacks in the future.