I think what people are missing, arguing the theoretical impact zones and how much turbulence/downwash would affect a drone, is that helicopters are manned. Lifeflight/medflight/careflight, or whatever carrier is in your area of the country, pilots are paid to save lives. They go out in, sometimes, really crappy weather and risk their and the crew's lives to help a complete stranger. As a former Black Hawk pilot, I can tell you that even the smallest drones strike terror in our hearts when seen from a cockpit. A helicopter being flown at 70-160 kias has very little time to react once the pilots see a 2' drone. We are busy scanning the ground for wires and the sky for other aircraft while talking, at times, to multiple people on multiple radios. And the drone may go through the windscreen. That never scared me as much as it getting sucked into an engine. That's what we were always worried about. Regardless, don't put a pilot's life at risk to get a "really neat picture".
Also, trying to predict how much a drone is impacted by rotorwash is about impossible. For one thing, a rotor is not a static force. Whether the aircraft is accelerating, decelerating, ascending, descending, flying into the wind, or quartering into/away from it, what the weather conditions are (updrafts, downdrafts, wind shear) and at what rate would tremendously impact the downwash. In fact, if you're decelerating quickly, the rotorwash is actually upward. And all these modes of flight, in varying degrees, is about impossible to tell from the ground. Of course you can tell if an aircraft is ascending/descending quickly, but that type of flight doesn't happen as often as you'd think.
