[loceng]

Of course they are preparing. Facial recognition, perhaps with voice confirmation - a good idea to have a built-in safety word or phrase so if stated then it silently triggers the authorities to intercept the vehicle - for beginning the vehicle/route to destination; the buttons in trunks should perhaps even notify authorities (?) if they are pressed while the vehicle is moving; it'd go badly for pranks amongst friends ... though hopefully the first occurrences of that will go into the news - would be good marketing anyway - might not be a good idea with further thought.

Edit re: safety word or phrase - It should also trigger recording of audio and video, perhaps they will record video and/or audio to make sure there's no shenanigans; as fun as it might be to have "fun" in a vehicle while getting driven somewhere autonomously, if it's shared then I think we as a society would opt to dissuade that behaviour...