A massive database of people's travel records is the best hope we have for reestablishing morality and church attendance. Cops could proactively round up mon-attendees or those who went to a synagogue. </christofascism>
Famously, excellent Dutch record keeping was bad for jewish people in the Netherlands in May 1940.
Also, an unlicensed-plated car and your dream enforcement, my first thought was of "illegal" cases I have done include moving a vehicle to a neighboring property a couple blocks away. How strict would you like it? Should I be forced to use an expensive tow service to move an unregistered car across the street on some slow residential street?