Inadvertent infractions into controlled airspace by quadcopters/tricopters/hexacopters etc is incredibly rare. I was looking at various examples of these devices recently and came to the conclusion they are all very fragile, and usually quite small. The vast majority weigh well under 2kg. In my career I have had various gulls and pigeons re-arrange their organs on my windscreen, radome and even the tips of my skids. Any self propelled meat-bomb or toy is a hazard, but since man took to the skies part of our lot as pilots.
Personally, I have come to the conclusion that the proliferation of geese, buzzards and gulls represent a much greater and much much more likely menace to me on ARR/DEP than the rogue idiot and his expensive RC toy. (ASK SULLY
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..and finally as for glide-slopes... I look very dimly on any controller who leaves me high and joining the ILS from above!
