I know from experience, most criminals want an easy score. They don't want to risk their life if they can get what they want from someone they perceive as weaker. Yes, there will be those on drugs or desperate enough or dumb enough that want a carriers gun. And they may try to take it, but most will stay away. IIRC correctly the signs usually state something to the effect of "this does not apply to concealed carry permit owners and those carrying legally." You found one incident. There are exceptions to every rule. Most criminals don't want resistance. They pick easy targets. Open carry deters armed robbery in Kennesaw Wrong. I've OC'd in Buckeye and Vances. No issues. I've OC'ed in Gander, although they were misinformed on the laws and have had no issues after that.