Their claim is that rules for what happens to passengers in the case of an oversold flight shouldn't apply, because this flight wasn't oversold and incorrectly

Their claim is that rules for what happens to passengers in the case of an oversold flight shouldn't apply, because this flight wasn't oversold and incorrectly boarded. Instead, employees never count towards overselling in the flight, but if their aren't enough employee-only seats, they'll take a customer seat instead. Regardless, this is all a civil matter, and in civil matters you do not have the right to physically fight with staff or the police because you aren't getting your way. Instead, you go to court.