Old news ... this came out a while back and there are several threads about it already.
What's ridiculous is the alarmist nature of your post.
Look into the actual details of Aeroscope and you find this:
AeroScope uses the existing communications link between a drone and its remote controller to broadcast identification information such as a registration or serial number, as well as basic telemetry, including location, altitude, speed and direction.
Police, security agencies, aviation authorities and other authorized parties can use an AeroScope receiver to monitor, analyze and act on that information.
It can only be used by law enforcement authorities that have the hardware and it will only work in the vicinity of the detector unit when it is turned on.
It's about as intrusive as this:
Flightradar24.com - Live flight tracker!
But is only small scale and will only be used in some local areas.
What do you see to be alarmed about with it?