sorry I have no problem faulting these people. Given that there were like 35 other people on the bus and this guy was obviously occupied to some extent with his victim they should have been able to easily distract and disable the attacker. Even my wife when she was 19-20 had the courage to pull her hair spray out of her bag and spray a man in his face that was wildly beating his infant child. She had no training, but she found a way to make him stop while she called for help. My oldest when around the 3rd grade(8 at the time) had no problem taking down a large 13 yo (almost twice his size) who was on top of and pounding on a kid much smaller than he was. Even at that age he didn't hesitate, he saw someone in trouble and helped. There's no excuse when you out number an assailant with those numbers even on a bus. Knife or not, someone or a combination of them had the means to stop him. As for weapons (lethal or otherwise) you should never rely on them. You never count on a baton, cane, knife or gun for self defense. Not enough people train real self defense, adding tools later, after learning and training to deal with situations unarmed. I will add that I have no problems with people carrying CCW in conjunction with this.