If we don't want it happening, we should make it illegal, simple as that.
I'm not really sure what your point was intended to be in your first paragraph. "I'm worried about ubiquitous drone-enabled surveillance." "Well, it's legal."
What part of that has anything to do with outdoor photography?
It's very hard to make surveillance illegal without making photography/videography illegal.
Try and write out the law, if you think you can.
Eg. Video recording is prohibited from any Unmanned Aircraft Systems (UAS), except by license from the FAA.
Said license would then include a requirement to get permission from the property owner.
It's one thing to put up a 9-ft tall fence surrounding your property to prevent passers by from taking photos as there are very few 10-ft tall people. It's another thing if 50-ft tall fences aren't enough.
Congratulations, you've now banned storing debug information for when one of these drones inevitably crashes. Since I'm sure they'll be using cameras for collision avoidance...