I fly FPV aircraft as a hobby and don't find anything particulary scary about police use of drones for increased situational awareness. They are excellent low cost tools that could probably save both civilian and law enforcement lives when used correctly.

A point that I find interesting - not brought up in the discussion here so far - is that the reduced cost in equipment also makes it easier for ordinary civilians to oversee police activity to some extent.

We're living in the world where anyone can make and own this amazing bit of technology. It strikes me as bizarre to limit police from using them.