Negligent drivers have killed people, not autopilot capabilities. Take the example in the recent Washington Post article where a driver ran through a stop sign at a T intersection, left the road, and killed a bystander.
What the article didn't say is that the system reduced cruise set point to 45 mph due to the road type, but the driver was _holding down the accelerator pedal_ to maintain 60 mph as it flew through the stop sign. The driver admitted they knew they were responsible for the controlling the car.
What is your evidence that drivers not knowing Autopilot capabilities, and not intentional misuse by negligent drivers, killed several people?