I know everyone loves the idea of self-driving cars but the reality of self-driving cars is really ugly. We need repetitions driving vehicles in order to operate them effectively. If you don't have enough repetitions driving a vehicle when something goes wrong you're not going to be able to operate the vehicle at all.
Furthermore, I'm skeptical that driverless vehicles can factor in all the ways in which someone might maliciously cause accidents or damage to these vehicles. I want to see what happens when someone figures out how to provide false input to the sensors on the vehicle.