Artificial intelligence is now an arms race. What if the bad guys win?

What negative impact could AI have? It's clear that AI – like any technology – could be used for corrupt means. Adversarial AI (where inputs can be carefully crafted to trick AI systems into misclassifying data) has already been demonstrated. It could, for example, make an AI vision system that recognises a red traffic light, perceive a green one instead – which could have disastrous ramifications for an autonomous vehicle.