"So what am I supposed to do if I find this invading my privacy?" There are laws and customs around public places and what may be done there. E.g. depending on

"So what am I supposed to do if I find this invading my privacy?" There are laws and customs around public places and what may be done there. E.g. depending on your local laws, if you're in public, people can usually take pictures of you and there's also nothing you can do about that. Don't like it? Petition to have the laws changed. This is how we deal with such things in a democracy. Trying to guild the engineers who build this system is both IMO wrong, but also completely pointless in terms of real-world effect.