1) We probably need to maintain a right of Transitus (transit) but not a right of Observo(observation) or Usus (use) for drones. I can’t see how to get around this. That means that you must have the ability to navigate but not the ability to observe. (this is pretty easy. we put blinders on horses, we can put a horizontal blinder on transiting drones.
2) Rights of Observo(observation) into human activity(not territory alone) require either permission or warrant. In other words, if you have a big ranch, or a territorial view, and the drone is silent, and in transit, it is hard to say that this infringes on your actions. However if your actions are being observed,such that you are put at risk of either embarrassment for normal activities (sex, affection, emotional release, play), or put at risk for predation (gathering information with which to engage in the imposition of costs), then
3) What I would expect to see otherwise is the equivalent of camouflage netting, designed to defeat drones, or active repulsion systems designed to blind them when attempting to observe homes.
4) What I hope someone creates is drones that kill other drones. These are very cheap to make, and a ‘necessary’ defense mechanism against the possibility of predation enhanced by observation (spying). As a criminal endeavor it is quite easy to use drones to look for homes to rob. It is also easy to use drones to attack power lines.
So a drone in motion at altitude is somewhat hard to criticize. While a drone hovering or exploring private property is not.