That's indeed a far more likely scenario. There are plenty of crazy humans around right now. It sure is a big threat, but AI can also help to prevent damage. To

That's indeed a far more likely scenario. There are plenty of crazy humans around right now. It sure is a big threat, but AI can also help to prevent damage. To stay with your truck example, Anis Amri for example would have killed far more had the truck not had a system that automatically engages brakes when there is an obstacle. Similarly, one could build strong AI systems to shoot down any drone attack. Bioweapons are more dangerous IMO because they are harder to defend from.