Last year in Mesa a guy was open carrying while in line at a fast food place. Someone came up behind him, reached down, grabbed his gun and ran off before the guy could even react. The moral of the story is that if you are going to open carry, use an effective retention holster and stay alert.
Also in AZ, this time of year it’s a Ruger LCP in a pocket holster
http://www.fox10phoenix.com/news/arizona-news/suspect-steals-gun-from-victim-at-valley-mcdonalds
I’m in Az too and see that open opportunity all the time. Some folks should just not carry open because they have bad habits and open themselves up to others and the ability to take their firearm. Those need to conceal carry for sure.