> I just wanted to point out that cost seemed to be used by you as an argument in favor of the use of drones by law enforcement, when according to four Supreme Court justices in certain cases lower cost can make it unconstitutional without first getting a warrant.

The only way I would see it being feasible to forbid government from using drones just because they're cheap, is to forbid it for everyone.

That might not be a bad idea (it's what we did for phone wiretapping), but then we still end up in a situation where the government has more power, as they would then exclusively control the use of public airspace for drones. Cops aren't the only ones who could make productive use of drones (nor is the government in general), so I'm not sure we'd want to make that tradeoff, at least unconditionally.