Actually it has already gone beyond the plate readers. Sniffing stations have been set up in certain states that appear to be just any road maintenance or construction sites but each car that goes by has their exhaust tested and if there is anything the gubment boys don't like you will have your plate scanned and a fine will be sent to you even if you have already passed the emission test for your state and purchased the sticker.
The slope just gets slipperier and more expensive
Thinking about setting up an LLC in a suitable state like Wyoming with an innocuous name and registering the car under it and then getting plates for it in my own state. Then any plate scan will show my business PO Box and town, not my name and street address. Getting insurance is not a problem. This is exactly how leased company cars are normally titled, so DMV doesn’t blink.
I can’t seem to lay my finger on the provision in the Fourth Amendment that gives the government the power to conduct continual recording of my travels. If they insist on violating the Fourth, and the insist on giving themselves a pass at violation of any of the plain language of the Constitution, I am under no obligation to make it easy for them.