That’s a good point. Once you accept that licensing drivers and registering vehicles is OK — even necessary — then it’s hard to expect any kind of privacy when it comes to information that is visible in public.
It’s the ARCHIVING of the data that’s the problem. When your plate is read and the time and location is archived, soon there will be a data base that has a history of your daily movements. From that, your future movements can be predicted.
Not a whole lot different than having a Bill Gates chip implanted in your skull.