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Like any piece of technology they are not inherently good or evil. The user defines that role.
The technology itself may be neutral however the policies in place whereas the NSA justifies firing a hell fire missle because the target looked around the right age to be in ISIS is not.
The issue here is with drones, in general. What you are arguing for is tighter regulation of the NSA, which may or may not be a valid issue, but is not the issue at hand. The issue here is are drones, as a whole, a threat? Or does the issue stem from those who misuse them?
I can see much farther away with binoculars than I can with a drone. Why does nobody care about them? Are microphones and cameras also invasions of privacy? What about the NSA? I don't think drones should be such a controversy. Punish those who use them irresponsibly, end of story.
A drone can potentially outrange binoculars. (Possibly not consumer grade but none the less)
Microphones and cameras are invasions of privacy when used certin ways such as say bugging someones home illegally.
The NSA is a separate topic entirely.