People can just NOT buy these things. We vote with our money, if we keep buying then they will keep invading our privacy.
You cannot sell yourself into slavery. You cannot sign a contract if you are a child. You can’t give up your right to basic work safety standards. The government does not allow people to enter into fundamentally abusive or exploitative agreements. I’m all for voting with your money when it comes to quality. When it comes to basic rights to privacy for you and those around you, this is not a free market issue, it is a rights issue. The police are overstepping and it should not be allowed.
Assuming a front door ring camera scenario, the main privacy invasion is not inflicted upon you but on your front door neighbour, which, at least in many European terraced house neighbourhoods, is literally a living room window a few meters away.
My mayor doesn’t have a ton of control over what the police department does; but they obviously can influence it. Similarly for the state legislature.
We also have laws defining advertising standards and protecting privacy. You can vote for people who would require that relationships like this be disclosed, or ban police use of private cameras without the owner’s direct consent. Or define ownership of the videos from cameras like this to say that the manufacturer has no right to use or share the footage.