That's quite an interesting comment on the tone of the argument you're responding to(http://www.paulgraham.com/disagree.html http://www.paulgraham.com/disagree.

That's quite an interesting comment on the tone of the argument you're responding to(http://www.paulgraham.com/disagree.html http://www.paulgraham.com/disagree.html), but doesn't actually refute it. People make mistakes, people are fallible, the /r/talesfromtechsupport subreddit goes to show that quite well. Despite this, you obviously don't want these people to die, and if not having a gun reduces the chance of a gun being turned on them, they may well be better without it. Having a gun in the scenario inherently raises the stakes to lethal, after all.