Here's some law enforcement perspective on Flock / ALPRs. Some dissent was moderated but you can view it with the archive feature of this reddit client.

https://photon-reddit.com/r/AskLE/comments/1srugkv

General ideas:

>people want crime if they oppose Flock

>no expectation of privacy in public

>people have cell phones so they shouldn't complain about other surveillance

>~~Flock~~ Mass surveillance is super effective (a lot of comments attest that it's super helpful.)