Local politicians need to coordinate to remove their Flock cameras at the same time and pass laws to prevent any new one from being put up. Flock doesn't have the resources to sue every single one of them, especially if every city commits to dragging out the process for as long as possible by creating as many legal hurdles as they can, all of which Flock would have to have a court rule on.

Kind of like how practically every Scientologist filed suit against the IRS over CoS having their tax exempt status revoked, to which the IRS eventually relented.

If I were a city government, I would just start charging Flock rent.