If all small vehicles had a sign on the door, saying if this vehicle is doing anything unsafe or illegal please ph# ....(see details)

This number, and under the sign would be a unit number, do you think peoples driving would improve knowing they could be called upon it at any time?
Or would they still be the lousy drivers they are?
As for more details the number could be to the police, or their insurance carrier, get to many complaints and your rates go up, or even cancelled.