I've open carried before just to see what people would do.
You can open carry with two steps to fire in Utah.
Most people seemed to just ignore it. There was one older guy that I noticed was staring and looked scared or concerned.
Overall, I don't see anything wrong with it, but I think having, hypothetically, 20% of people walking around with guns on their hips or over your shoulder seems a bit bizarre and crazy.
When I've witnessed open carry, I've just ignored it. It's no bother to me.