Way i look at it.. anytime the airplane is over the runway or turning the plane to land, it poses a "hazard". Only way to eliminate all the hazards is to not fly. I think he's being a little over anal (if it was a non crowded day). But if it was a crowded day then, it would probly be best to not do a low slow circle, as they probly do pose a bit more of a safety problem than if you were up at altitude.