I kind of touched on this on the other thread, but someone openly carrying is making a statement ("I'm dangerous"), and going out of their way to make others around them uncomfortable, nervous, and offended. I can imagine seeing such a person drinking a beer (legal), who is now also impared.

"God created man, and Sam Colt made them equal."

Since virtually no one is likely to be openly carrying around this person, no one else is equal, that is to say, they are superior to all around them. Should someone want to take their gun away (you can't come into my store wearing that), you are now in a confrontation with an armed person, and you are arguing with them about something that gives them their status above others at the time. People don't like to lose their status, so you now have a dangerous person. If they have been drinking, you have a dangerous person with reduced restraint, reduced reasoning ability, and propensity to fly into a rage. In that condition, anything can happen. They may want to "teach a lesson".

Yikes. These are people to be shunned and avoided.