This sounds an awful lot like victim blaming, and you're advocating for what here? For random passengers to step in and beat this guy? If the airline attendants couldn't control him, why should passengers need to step in? These women should rely on the random willingness of strangers to protect them? Also from a legal standpoint, other passengers do not owe a duty of care to other passengers. Only the airline has a legal duty to protect their passengers. So these people should absolutely should sue the shit ouf of this airline, because they negligently allowed an unruly passenger to continue harrassing other passengers for an entire flight when they were the only ones with a legal obligation to act.