Thanks for your comments, I'm inclined to basically agree with what you've said.

I am glad to know that my comments have made a difference and that they were welcome. I think LessWrong could benefit a lot from The Power of Reinforcement, so I am glad to see someone doing this.

the only solution is to make these autonomous technologies as absolutely safe as possible.

Actually, I don't think that approach will work in this scenario. When it comes to killer robots, the militaries will make them as dangerous as possible (but controllable, of course). However, the biggest problem isn't that they'll shoot innocent people - that's a problem, but there's a worse one. The worst one is that we may soon live in an age where anyone can decide to make themselves an army. Making killer robots safe is an oxymoron. There needs to be a solution that's really out of the box.