I know this is an extremely hot take, but it's not the license plate reading service that bothers me.

A license plate is specifically a tracking number to identify a registered vehicle on a public road. The 4th Amendment gives you privacy inside of your car, but your car is not itself guaranteed privacy. Before Flock, police departments already had informally aggregated data from speed cameras, red light cameras, and toll booths. The distinction being that any evidence collected in such a way is purely circumstantial and still requires a warrant to investigate.

The big irony though of Flock plate readers is that because they're just tracking license plates, they're not actually that useful at solving meaningful crime. Realistically there are a small number of hit-and-runs that could be solved, and they can make certain investigations a bit shorter. And most of what we read about is officer directed stalking or harassment activities.

It's all of Flock's other advertised services that should really freak people out. The facial recognition, the audio scanners, the individual-level tracking databases - right now they're a fancy VIN lookup service. It's all the other stuff they're trying to sell departments on that are getting into really egregious 4th Amendment violations.

Recent WIRED[1] article goes in depth on this exact problem:

> Another prompt instructs the system to list everyone arrested more than twice in two years for “any offense,” exempting only narcotics arrests, and then says to map where those people live, retrieve the calls for service at their homes, and “do a workup on the top three individuals.” The prompt begins with everyone in the area who has an arrest record and ends with dossiers on three of them, chosen by the software.

> A “workup,” in Flock’s terminology, is a one-command background check. It starts with a name and a date of birth and returns what the department’s records and commercial data hold: vehicles, prior listings as a suspect, and, on a second screen, relatives, phone numbers, and online accounts.

This stuff is beyond the wildest fantasies of East Germany's Stasi, and it's going to be a whack-a-mole game dealing with all the baby Flocks that spring up if Flock itself can be shut down.

[1] https://www.wired.com/story/flock-safety-os-investigate/

They aren't just tracking license plates though. They're tracking people - let me explain. Their 'ALPR' cameras (purposefully misleading to call them ALPR btw) capture the footage and send it off to their servers where it's retained - building a long-term historical location history on every vehicle. Advanced analysis is performed on the data to provide features to their customers such as the ability to search for vehicles based on a description of its characteristics (no plate needed), real-time route prediction, location heatmaps, and identifying vehicles that travel together (convoy search). Here's the important part - data is also ingested into another service they run called 'Nova', which is essentially a people search tool that connects the vehicles they capture directly to people and their PII. Access to their platforms (Flock OS, Nova, etc.) is sold via a subscription to law enforcement where they can perform searches for individuals or vehicle whereabouts for any reason, without a warrant, and practically no oversight or regulations.