I carry a pistol (and other tools) for my protection and that of my family. If the situation has deteriorated to the point that I am in fear for my life or fearful of serious bodily injury, and my options are to quietly acquiesce to being maimed, crippled or killed, or to gather up an honor guard to accompany me to Valhalla, I know what my choice will be. It doesn't matter if it's a gang rampaging in a train or a robbery in a convenience store, I will not submit and go down quietly. I have given this careful consideration over a period of time and made my decision: I will not be herded to slaughter.
Whether this would have been an appropriate action on this train, I don't know; I wasn't there. Neither was anybody who is commenting in this thread. But I do know where my line in the sand is. No false bravado, just fact.