This gives you an idea of what capability cameras on quadcopters have.
http://www.youtube.com/watch?v=GC85qvEhbLA#
that's a bit misleading
there are multiple drones capable of much better resolution than that, mind you at a cost, and then if commercial then licensed by CASA and not worth the loss if found doing the wrong thing
I too would litigate if the drone I was flying today got taken out- the thing is worth over $100k, mind you hawks have taken a liking to it in the past hence the eyes
and yes it can fly above the limits mentioned earlier, but again need license to do so, and VHF etc etc.
and again this is old tech around 3 years old, camera tech for the photogrammetry has advanced, if this flew over your house at 150m you wouldn't even know