Think about a police department or intelligence agency who can make you disappear anytime they want, without needing to devote manpower or risk lives at the task. Disturbingly dystopian.

Think about a black-hat hacker who can have a side gig making sweet ransom money by kidnapping you or your child from a thousand miles away. Aggressively anarchistic.

Think about a rogue employee who works for Tesla or someone and has legit access to the tech, and knows the GPS coordinates of the nearest body of water. Maniacally murderous.

Think about a terrorist group whose only objective is to cause as much damage as possible, and figures out how to access the whole fleet of vehicles at once. Grandly genocidal.

Self-driving cars are downright terrifying.