Elon Musk - I don't trust the guy, at least not right now. But, I found this article interesting.

"Elon Musk began warning about the possibility of A.I. running amok three years ago. It probably hadn’t eased his mind when one of Hassabis’s partners in DeepMind, Shane Legg, stated flatly, “I think human extinction will probably occur, and technology will likely play a part in this.”"

vanityfair.com/news/2017/03/elon-musk-billion-dollar-crusade-to-stop-ai-space-x