I'm not sure how they do it exactly, but I imagine you could, as a first approximation, infer something like that from how hard the driver brakes and how reliab

I'm not sure how they do it exactly, but I imagine you could, as a first approximation, infer something like that from how hard the driver brakes and how reliably they keep distance from other cars, both of which Tesla's telemetry can and does collect. Tesla will beep at you if it thinks you're forgetting to brake. It also knows if you ran a red light or a stop sign, since it recognizes traffic lights and signs. It knows if you're speeding, too. And it knows if you're speeding near a school or in a construction area, as well. AI is a bit of a double edged sword, since if Tesla knows this, it's only a matter of time before this data makes its way into some sort of a "social score" metric, that will affect things like car and health insurance.