When ever you do a circle or a circuit, you will be facing the pits at some point during the turn in along the runway. There are two ways to minimize the time that the nose of your jet is pointing at the pits..... one is to do a split S over the runway, the other is to do the turn in (towards the runway) farther out.. If you are doing 360's directly in front of the pits, then the nose-in exposure could be a quarter turn or more, whereas if you were a hundred yards to the left, say, that exposure could be only 5 or 10 degrees of the circle.... That maybe what the safety guy was getting at.......dunno..a lot depends on the circumstances at the time..how many planes in the air, what type and capabilities, was anyone waiting to fly, how close to the flightline you were flying...etc etc etc....
However, I would rather see a jet go through that quarter turn in a couple of seconds than stand in front of a guy with a 40% yak trying to do his first rolling circle.... You could be looking at that big prop for 10 or 15 seconds....which poses the greater danger ???


The circling itself certainly isn't dangerous, in fact it is used in several elements and maneuvers in Scalemasters and IMAC.