But Flock DOES follow you around, in the sense that you can't really escape being observed by a series of ALPRs on a highway network.

Read some cases of who's suffering now. Cops (or ICE) can choose a passing vehicle to run a ALPR search on, finding out what states it just passed through. When they consider it "suspicious", said driver gets stopped, searched, and even detained.

Look at how ALPR is being used and whose rights are being violated as a result. Hint: it's not criminals.