At the risk of exposing myself to some of PPrune's usual argumentum ad hominem, the headline of the Charleston article might more properly be phrased as "Helicopter pilot blames drone for helicopter crash" if the events are accurately reported.
Before we condemn either party in this accident, it would be interesting to know which of them was there first, whether it was 'see and avoid' airspace, what the Airprox geometry was (rules of the air), if the drone operator saw the R22 (FPV or direct vision), and why the instructor chose to land on a small tree instead of moving away.
It is entirely possible that both R22 and drone pilots were entitled to be operating in the same location and that, on this occasion the big sky theory let them down.
BTW, I am not a drone operator!