How far is too far with proactive measures?

Currently we have reached the point where we are able to remotely manage vehicles, get enough metadata to create a firm picture of any individual event on going, but to this day it's mainly re-active or opt-in event. How long before we demand this is reactive?

Lets assume one day, car insurance companies or an overzealous government decides to forgo with traffic speedlimit signs, and make it a trigger to cars forcing the car limit, checking your drinking and BAC …

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