Is the annoying buzz you hear outside your window someone trimming their lawn, or is it a drone hovering nearby and spying on you? These days, one never knows. If you're concerned about drones and privacy, you may want to attend/watch the Federal Trade Commission's Oct. 13 workshop/webcast on this issue. Details about how to participate can be found on the FTC site.
It doesn't say, but I'm going to assume you can't "attend" by sending a drone with a camera to sit in for you.