Again... People seem to be making their own rules for a stitation that the DOT already calls out
>Generally, no. If you have met the following conditions, airlines are not allowed to deny you permission to board, or remove you from the flight if you have already boarded the flight:
You have checked-in for your flight before the check-in deadline set by the airlines; and
A gate agent has accepted your paper boarding pass or electronically scanned your boarding pass and let you know that you may proceed to board
> "On January 13, 2021, the United States Department of Transportation amended its rules, forbidding involuntarily bumping from an overbooked flight after boarding starting on April 21."
>Generally, no. If you have met the following conditions, airlines are not allowed to deny you permission to board, or remove you from the flight if you have already boarded the flight: You have checked-in for your flight before the check-in deadline set by the airlines; and A gate agent has accepted your paper boarding pass or electronically scanned your boarding pass and let you know that you may proceed to board
https://www.transportation.gov/individuals/aviation-consumer...