Earlier quoted context omitted.
So what am I supposed to do if I find this invading my privacy? Not walk within 10m of such a billboard? It's not like there's any other active way to opt out of this. I suppose a banner saying "you are being tracked" on tom of such a billboard could have quite an interesting effect. Come to think of it I've seen "Smile, you're being recorded!" in some shops.
"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 w…
Quite the opposite, in France "le droit à l'image" is a privacy right that allows anyone to request that any picture of them being taken to be deleted.