Carrying a gun isn’t all it’s cracked up to be. I learned that most people I encountered actually didn’t feel better knowing that I had a gun. And, though I tried to keep it concealed in a hip holster under a shirt or jacket, the people who inevitably did glimpse it frequently wondered why I had it and whether my gun or my presence put them in danger — like the staff and customers who panicked at that Walmart in Missouri. Even the people who knew and trusted me — knowing that I was a responsible gun owner who had been threatened — wondered if being near me in public exposed them to … danger …