The word 'hackers' implies evil-doing. I'd be more inclined to use something like 'stress-testers' that signifies somebody finding the limits of the car's safet

The word 'hackers' implies evil-doing. I'd be more inclined to use something like 'stress-testers' that signifies somebody finding the limits of the car's safety abilities. If three small markers are sufficient to interfere with a car's autopilot, that's one car I will never get into.