Tracking a car by the license plate!

Not in the U.S., at least anywhere I've ever lived. New owner = new plate. New state = new plate.

I think you'll find this is not all true. WA state the plates stay with the car. "I think" CA is the same, I did not check.................

According to this, AK stays with car, also CA, Delaware, Michigan, I did not check further

Transfer of Plates - AAA Digest of Motor Laws