LOL @ Rum
Yes, I doubt I'd step out in front of a car now... But if "all" cars are heading this way, in the next decade or two we could expect feasibly that people could readily identify cars with this feature, and if daring enough, step out to stop a car- or more sensibly perhaps- use a prop of some kind to trigger the sensors...
Then if the car still thinks it's at risk of collision.... It may stop forward motion..?