An alternative is you can try to convince those people that, while their desire to reduce crime is perfectly understandable, this might not be the way to do it effectively, to say nothing of the potential avenues for abuse (and in current day America, I'd be very wary of such avenues)
It remains an issue of trust for me. You not only have to trust your police and government(s), but you have to trust Flock too - and that trust has to remain throughout changing governments and owners of that company. I have a healthy distrust of both, particularly lately.
Just as importantly, but more to the point, is still the question of whether they're actually useful. To that end, does not the same logic apply to being able to pressure nearby municipalities to remove the cameras?
In any case, while I remain fundamentally opposed to such surveillance, you raise very good points, and I appreciate you taking the time to explain your position in this thread.