I wonder if an extremely range-limited RFID plate with a challenge-response system that only local LEAs can read (modulo leaks, of course) would be better.  We&#x27;d lose the ability for people reporting a crime to say &quot;plate XYZ on green car at location A just did Q illegal thing&quot;, but maybe &quot;green car at location A just did Q illegal thing&quot; would be good enough.