If the police are called about someone pulling a gun, they arrive in force. They don't send a single cruiser. At least... not anywhere I've ever lived (Texas, Mississippi, Colorado, Idaho, Oregon). They don't have a casual conversation with the person that brandished the weapon. They don't say "oh... that was a really good reason" then go arrest someone for calling him names. Of course, gangstas with outstanding warrants, guns, knives and drugs don't hang out as police are arriving either.
What this wreaks of is someone that wanted to come up with a good story that highlighted the coolness of a CCW. Maybe it's because he's had the CCW for a little while yet and hasn't had a reason to use it and thought "hey.. this would be a great reason to use it." I dunno, but the story is off on so many facets that it's not even remotely believable. There's no need to "disprove" it. There are no aspects of it that are even feasible.
All the "wtg" gives people the impression that this was a good thing. It was not. Anyone thinking they could do the same thing whenever they see some gangstas is going to be in for a rather rude awakening... if they survive... as that's just the beginning of the poopstorm that's coming.
The scenario, as described, was weak and would result in the person that pulled the weapon getting charges pressed on him a rather large majority of the time. Please don't think otherwise.