I don't think that's comparable since there is no rideradar24 where you could check out every ride anyone takes with their car. Also, who owns which plate is not public information.

I believe that plenty of people would object to that level of tracking citing privacy reasons.

(I'm not against ADS-B myself.)

True, I suppose that is more like the tail call signs it whatever they're called - only recorded (possibly automatically like ANPR) if someone bothers too, not broadcasted or squawked and ident'd.

I can't bear it: of course I meant 'or whatever' and 'bothers to', typing from mobile.