Originally Posted by
Wpgjetse
Yes, No swapping. You can change seats at the start of the flight only.
If I witnessed a seat swap mid-flight that was done quietly, I wouldn't say anything, but if it was done in a disturbing fashion I'd talk to the SD.
This is something that if enough people try or abuse, then AC may just come down hard and say "no seat swaps at all, even at the start of a flight".