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 who build this system is both IMO wrong, but also completely pointless in terms of real-world effect.
> if you're in public, people can usually take pictures of you and there's also nothing you can do about that.
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.
Photographs are legal in public. This is just taking that to the extreme. Address that law. What bothers me is ALPR. Taken to an extreme you can just put a camera on every intersection and effectively track all vehicles without a warrant.
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.