> Second, no one is being stalked or harassed by a fixed camera.

Not the camera, no, just the eyes behind it -- namely police officers who have been caught stalking exes via Flock.

> Third, there are problems that only surveillance can reasonably solve (loud cars, dangerous speeding).

In many jurisdictions in the US, police must personally witness the events to intervene. /Traffic/ cameras are one thing -- they only record those who violate the laws (red light, speeding). But continual monitoring of all persons passing falls into another bucket, like a Stringray device would.

> The non-specific and general fear of abuse is not a good counterargument.

The abuse of this data is already happening. It's not a hypothetical.