But if your spouse/SO/sister/mother/girlfriend/whatever was assaulted while jogging in a park that had Flock cameras, and it allowed law enforcement to quickly identify, track, apprehend and charge the criminal, you'd absolutely be grateful for the technology. There's nothing worse than being told "we don't have any leads" when someone you care about has been attacked.
Anyhow, if you read the flock database, they're overwhelmingly not using them for the purposes of public safety or random crime.