The fact that they live locally, in regular housing instead of a secured base? The fact that their entire motor pool is kept in one place with no air cover and there is a handy three digit number that summons them to any location? The fact that drones are cheap, and one commie tech specialist could crank them out of any garage from basic parts?

In fact, think about quadcopter drones for a second. Who does their existence pose a bigger problem for: a shifting mass of dissidents who can blend in with the crowd and have no obvious high value targets, or a paramilitary force with fixed locations, vulnerable equipment stockpiles and known, uniformed personnel travelling alone in marked vehicles?