Where exactly are people walking around with handguns and "resolving their disputes" by firing them? When an aggressor has done something to earn himself a fatal dose of lead poisoning, that's not a "dispute" that's righteous self-defense.
From the very beginning of the concealed carry movement, morons like this have been trotting out ridiculous predictions of more shootouts at the OK Corral and gun fights every time somebody gets cut off in traffic. It has never happened. Crime has dropped significantly since the early 1990s. Yeah I know, facts and reality don't matter to leftist ideologues.