The same safety benefit, without the risk, could be accomplished using some kind of signal with the sirens for "you're getting a ticket", sending a ticket in the mail, and logging it in a database somewhere so the person can look up why they got fined. Warnings could be done in the same way.

If someone is impaired enough to be driving dangerously, police will notice that and should pull them over. I'm talking about the minor infractions which (I presume) make up the majority of stops.