If you don't like most types of surveillance there are a lot of countermeasures a concerned party can use. Run your own servers, use encryption, etc.
The problem with license plates is that the equivalent thing is to obscure your license plate, which is prohibited by law. So it's not just that the government is collecting publicly available information, it's that you're prohibited by law from not making the information public. Which is a different kind of thing that deserves to be treated differently.