They're not getting banned fast, and regulation isn't a lost cause. Flock, in particular, is getting contracts cancelled primarily in ultra-liberal municipalities, and that's in large part because of their public relationship with the current federal administration. But ALPRs are going up everywhere; they're a commodity technology. We canceled our Flock contract (I wasn't psyched about that) and we're ringed by munis that use ALPRs from vendors that haven't made themselves political flashpoints.
I'm fond of pointing out on HN that the muni I live in is likely one of the 10 most progressive-leaning in the country (it's the most progressive-leaning municipality in Chicagoland). Even here, Flock had an ardent cheering section, of normal people who think expediting the interdiction of stolen vehicles (which are vectors of violent crime) is a perfectly reasonable thing for a city to invest in.
I got caught by an ALPR 20 years ago. I've been confused about 1) what is Flock's innovation 2) why are people up in arm.