I'd be inclined to agree if this were limited to public spaces only. But here's the issue: aerial surveillance isn't limited to public areas only. If I'm survei

I'd be inclined to agree if this were limited to public spaces only. But here's the issue: aerial surveillance isn't limited to public areas only. If I'm surveilling a public park aerially I'm also necessarily surveilling the houses next to it. If I have to get a warrant to perform that survellance then good enough. The warrant will limit the surveillance. No warrant? Now it drifts into that surveillance state place. A police officer on patrol can't police private property without trespassing; the houses bordering the park likely have privacy fences, foliage coverage, etc. to prevent their owners from being watched (by a anyone, not just police) on their pool deck or wherever. Drones (and planes) see right over those, and without warrants they're quite likely to result in privacy violations.