They Must Must Be Solid Citizens--they Have Guns!

Think about it--isn't the premise of open carry that this becomes acceptable behaviour?  People should see someone walking around with a weapon and assume that everything is OK.
Isn't the idea that people are in a state of code yellow?

No specific threat situation. Your mindset is that "today could be the day I may have to defend myself". You are simply aware that the world is a potentially unfriendly place and that you are prepared to defend yourself, if necessary. You use your eyes and ears, and realize that "I may have to shoot today".