I didn't read each and every post in this thread. I instead opted to risk repetition in simply stating the following opinions:
What people don't know won't hurt them. I don't mean physically hurt, I mean it won't bother them not to know. I believe that openly advertising the fact that you have a handgun by carrying exposed in public opens the door for a whole host of unwanted problems, not the least of which is stupid people who will inevitably stare, or worse yet, comment about it, doing little more than drawing more attention to the fact that some putz is walking around with a John Wayne complex.
The next thing it does is targets you as someone who has a gun that could potentially be stolen, thereby making it the object of a criminals scheming. The idea that criminals avoid known armed individuals is a misconception. If a criminal doesn't know you have a weapon or not, he's left with a 50/50 gamble and that's what criminals don't like. They like when they know the odds are in their favor, like when you advertise the fact you have a gun and they follow you just waiting for the opportunity to strike and take it.
I firmly believe, and not to tread on anyone's sense of offense, but the only real reason behind anyone walking about in public openly wearing a handgun is because of the false pretense that EVERYONE around them, criminals included will all of a sudden reel in awe and respect for them and leave them alone because he's got the Dirty Hairy / John Wayne thing going on. Never mind the percentage of people who they possibly terrify with it in the process.
The only way to own and carry a handgun responsibly is so that nobody has a clue, and be aware of your surroundings. There is always a method for carrying concealed that will allow for a quick presentation to diffuse a situation should the situation call for it. There is no justification in my book other than a heavy case of hero syndrome for carrying openly in public. None.
I live in NYS where it is mandatory and I'll tell you a little story about what happens when you don't. While hunting one winter with a stainless S&W 629 .44, my buddies and I stopped in at a Mickey D's on our way home to grab a quick sandwich. It was at a location where every skier from NJ to ME happened to be all at the same time. Well, the one time I don't ensure that my coat was over the revolver on my side was the one time it took for the 16 year old girl at the register to happen to see it and asked if I was a police officer. I replied no and wondered what would have given her that idea. She pointed straight at me and loudly said "well I saw that huge gun on your side and just figured you were!" You could have heard a pin drop in that place as every person in there suddenly stopped and all eyes were fixed dead on me for what seemed an eternity as I turned about 9 shades of red with embarrassment as I pulled my coattail over it. I stepped out of the line and said to my buddies, lets get out of here and I left. If you need to ask why, or have some contradicting stance as to why I should have stood my ground then words like privacy, modesty, subtlety, inconspicuous are words you are not familiar with and are the core of the values any gun carrier should abide by, not "Hey look at me I'm a badass with a gun!"
Just one man's opinion, no profession of fact intended or inferred.