Re: "We’re not totally clear how the car intends to deal with being rear-ended"
> Maybe blame the car behind, like a human driver would do?
Indeed, that's what the coppers do at the scene of most accidents when someone inevitably bumps into someone in the traffic jam that ensues. If you weren't quick enough on the brakes, you're driving without due care and attention. If you were driving too close, that's reckless driving. Either case, have some points and/or a fine.
Icon - that's what you should be able to do if the person in front does first