Is the argument that Flock cameras are used for mass surveillance defensible, or just paranoia, and if it is real, does anyone have a good idea of whether the same argument would apply in the UK?
Our definitions of mass surveillance must differ for you to ask this. Flock cameras are marketed and purchases for mass surveillance expressly.
That doesn't mean the cameras are good; I think they aren't, or rather, at least in my metro, I know they aren't.
In the vast majority of cases this means: "enforcing immigration law." A presidential administration deeming it politically expedient to import illegal immigrants via turning a blind eye doesn't change the law of the land.
> that they're entitled to the ALPR data collected by municipalities in order to accomplish this goal
"Entitled" to purchase something that is being sold on the market for a fair price? Why wouldn't they be entitled to purchase this info if a vendor wishes to sell it to them?