Here’s a little known fact: One of the people who pinned Jared Loughner down after he shot Gabby Giffords was carrying with a permit. When asked later why he didn’t just shoot Loughner, he said (paraphrased), We had him under control. Shooting him would have been murder.
People who carry tend to know the law, purely for defensive reasons. Who wants to go to trial for murder? For that matter, who wants a murder on their conscience?
and who wants to spend a year in and out of a courtroom and $50k-$100k on defense attorneys?