And my guess is we only ever find out about some probably very small percentage of the abuses by police, at least in theory having rules and oversight of their use of these systems.

What are the chances that nobody at Flock has ever abused their access?

Cynical-me assumes that if you're the sort of person who'd take a job at a company like Flock, which I and evidently a lot of other people consider morally bankrupt, then you are at least as likely as a typical cop to think that stalking your exes or random attractive people you see - is just a perk of your job, not something that should come with jail time.