What Mike said in #7 pretty much summarizes my opinion as well. I figure that my obligation is to be as good a witness as I possibly can and to render aid to the victim. The police can catch the bad guy.
Maybe my philosophy is different from others, but when I'm carrying a firearm, my goal is to do everything I can to keep myself out of a situation where I'd need to use it. (The corollary to that is when I'm not carrying, I do everything I can to keep myself out of a situation where I wished that I had one.)
Well we don't rent pigs and I figure it's better to say it right out front because a man that does like to rent pigs is... he's hard to stop - Gus McCrae