My point was, if speed camera warnings are only for people wanting to break the law how would you explain this site to exist.
https://radars.securite-routiere.gouv.fr/#/
sos it means there has to be at least one other reasons for warning people of speed cameras which is not breaking the law, or do you think the French authorities want you to help break the law there?
I don't know which one but there has to be one right?
As for the US I'd say with a cynical pragmatism it's because they are privatized afaik and thus have a big lobby lol