[filup]

It hasn't been articulated in court. But what flock has essentially done is created a GPS system without satilites.

See Jones vs USA.

Sufficiently saturated ALPRs across the country give you the same capability of GPS. Without GPS.

[Manuel_D]

Jones vs USA involved physically interacting with a person's vehicle. Furthermore, the device would track users even if they were on private property.

By comparison Flock only operates in public, in places that are in plain view.