A major issue with surveillance tech like this is that it actually works.
It does what it's advertised to do: it lets the police track and catch criminals easier.
This is especially meaningful in cases of crimes where either the information availability or the effort of tracking the criminal down often make enforcement prohibitive.
If Flock had better PR people, they'd have no shortage of shoplifters, joyriders, car window smashers, porch poachers, carjackers and drug mules that were caught using their tech to parade around.
It's just that this benefit comes at the cost of privacy being diminished for everyone.