What about when those cameras start sending data to some central 3rd party in who then tracks people. What if everybody installs those cameras? Do you now have

What about when those cameras start sending data to some central 3rd party in who then tracks people. What if everybody installs those cameras? Do you now have to avoid everywhere? This is exactly what has happened with the tracking scripts from facebook and google. They provide some service, but the tradeoff is that you have to let them spy on your users. So the counter question is: "Can you not just avoid google - to protect your privacy?"