If I had children your damn right I'd teach my son to take on knife wielding maniacs.
Well I would hope you'd teach ample amounts of discretion with that. I can't help but go back to the example of the Greyhound bus, and how many people scream that they wish the men had stayed and fought. Well, I'd hazard a guess to say that if you were one of the people trying to get OFF that bus, you'd be pretty damn happy that no one decided to stand in the aisle and have a knife fight instead of getting the hell out of your way so you could get to safety. And I'm betting that when that knife wielding maniac tried to join you outside the bus, and the men held the doors closed, those women and children were feeling pretty freaking grateful. Sometimes staying to fight just puts more people at risk needlessly.