There's surely plenty of entities that need better controls around usage of technology / records / etc, but this is an example of somebody having an incentive and then following through.

1. Protest via yard signs and awareness (what you're doing)

2. Impermanent vandalism. I like the idea of hanging copies of the fourth amendment over the lenses

3. Permanent vandalism. I think we need bounties on camera destruction and public legal funds to assist in defense, bail, etc.

The police as a class/caste are not interested in the fundamental principles that America was founded on. Individual officers may be interested in civil freedom and privacy but as an entity they only ever march in the direction of total surveillance and domination of the citizenry.