There are a few videos of open carry on youtube. The ones I've seen are of some guys in New Hampshire. They did a litter pickup in one of the "rough" neighborhoods in New Hampshire and they were OCing the whole time. Then there was another time where they were OCing down the street and they were stopped by a state trooper or something and they had to call the local PD out to set the trooper straight.
I do think it's a neat idea. I might see if my wife or bro is willing to be my camerman. I bet you'd get more attention that way. People might not notice a small hunk of metal next to your hip but they seem to home in onto cameras. Or maybe I can buy one of those nifty button cams.