The evil motorist is an easy target for the legislators and police.
Catching rapists? Nope. Too difficult.
Catching kidnappers? Nope. Too difficult.
Catching murderers then? Nope. Too difficult.
Catching people who drive a bit fast? Yes!!! At last. A group of people worth spending time, resources and money to track down.
But ... if they are doing no harm, and you can only catch them by checking the time at two points on their journey, shouldn't we leave them be, and divert the resources towards tracking down dangerous criminals???
Noooooo!!!! I can hear the legislators chanting ...
"WE HATE DRIVERS. WE HATE DRIVERS.
FINE THEM. BAN THEM. STOP THEM."
Som if you get mugged or raped or burgled, don't bother pestering the police. They are far too busy trying to catch the really serious baddies, namely the car drivers who are wickedly doing 45mph in a 40 zone.