My SA would definitely go up. If the weapon is slung over his shoulder I don't think I would have a problem with that. However if he has the butt of the rifle tucked in his shoulder I might see that as way too aggressive. When I was Security Forces in the Air Force we weren't allowed to go into the PX because civilians were terrified of our M16A2's. I like the idea of Open carry but I don't see myself hanging around people that I don't know carrying weapons I am not sure they know how to use or their purpose.