You always hope that the court would exercise common sense and the clean hands doctrine, but that is far from a guarantee and knowing what happens in the courts in my county, I cannot emphasize that enough. Their argument would be that even if the person was acting erratically, the presence of more FAs than the uncontrollable individual would have been more than enough to subdue the individual without causing the individual harm and that the mere presence of FAs meant that harm to you is unlikely. The entrance of an untrained individual, that is also not a DL employee, is reckless and would likely result in harm that would not have resulted otherwise. Civil courts have a lower standard of proof. I would also keep in mind where the event happens. I might be more willing to assist if I were in the South, but would probably be willing to take a punch or two before entering the fray on the West Coast which gives criminals more rights than victims. Hopefully none of us ever encounter the situation, but the unfortunate reality of today's society is that no good deed goes unpunished.