Y'know, I heard much the same "argument" from some LEO's during the CHL debate - that folks would be waving guns around, etc. I think what they didn't count on was the seriousness with which MOST folks take carrying a firearm.
Hell, I suddenly become more mature if I've even got guns in the car with me, never mind on my hip. Why? I get reminded that maybe flipping off that guy who almost hit me might just turn into a lethal confrontation (though I always see myself as the one left standing). Suddenly it's just not worth it.
I've mentioned this to other people and they've affirmed my experience.
I did call that assumption wildly ridiculous.
That's not what he's upset about. He's (and I'm) upset that you called the person who posted "stupid". Over the line, man. Make counter arguments based on facts and reason, but as soon as you get personal you've lost, and if you get insulting that's too far.