IAACWAIK (I am a coder with AI knowledge), and I don't fear any sort of sentient machine. I fear a lot of people. Perhaps we should get the dangerous people sorted out first before we start worrying about the sentient free roaming machines that don't exist yet and won't exist for many, many, years.
I mean Christ, what kind of retard is running around worrying about problems that aren't even real? This guy might as well be writing books about how to fight zombies or repel vampires and boogie-men. Entertaining fiction topics to be sure, but a real discussion topic? Elon Musk knows fuck all nothing about AI on the whole, and he is signing this letter because he knows first hand about killer AIs? Elon, you want to save some lives? Get back to making your fucking electric slot cars, because more people will die as a result of carbon induced climate change in the next 100 years than will die as a result of the cast of the movie 'short circut' going berserk.
Shit to be scared of: cancer, heart disease, auto-accidents.
Shit to not be scared of: killer asteroids, ebola, and oh yeah, and homicidal AIs.
People to think of as retards: Elon Musk