I’m immediately reminded of Jon Ronson’s article ‘Who killed Richard Cullen?’[1] where companies such as Experian sell relational geo-data on people to whatever companies want to use that data to target and potentially manipulate people.
[1] https://www.theguardian.com/money/2005/jul/16/creditcards.de...
In Canada anybody can get the name associated with a plate, but it costs ~$30 CAD and your name and drivers license number is verified and stored to do so. If you want the address you must be a licensed private investigator (~$350 CAD course and ~$80 CAD test) or police, again the access is logged.
In the UK you need to write to the ministry for even a name, not sure of the level of difficulty or likelihood of the request being granted.
In the USA, it depends on the state. Many you can get freely and anonymously from a 3rd party database.
Not legal ones. The whole point of the number plate is as an identifier for the vehicle.
I've been thinking about logging all the traffic down my street as a fun project as a way to learn OpenCV.