Toyota, it seems, really doesn’t like the thought of you getting plastered and then going out driving their cars. Thus, they’ve decided to figure out a way to wire a breathalyzer to your ignition column and make the car impossible to start unless you blow a clean meter, or, show that your blood alcohol content is less than that required by law in order to start your car.
On the one hand, this seems not only spectacularly intrusive but hard to engineer. Considering that laws vary by state as to how much is too much, will they engineer these devices for each state? Will you have to re-register when you move? What about used cars?
But on the other hand, stopping drunk driving before it can even leave the parking lot is a hard thing to be against.
Similar devices already exist, they’re just generally reserved for people already convicted of drunk driving.