Microsoft has three rules the Guardian Angel's AI must follow:

      1. The software may not injure a human being or, through inaction, allow a human being to come to harm.
      2. The software must obey any orders given to it by human beings, except where such orders would conflict with the First Law.
      3. The software must protect its own existence as long as such protection does not conflict with the First or Second Law.

In theory, nothing could go wrong.

Something like this has already been done. See: http://en.wikipedia.org/wiki/Mad_Max_Beyond_Thunderdome

I'm skeptical of a lot of things. Just because I don't blindly and passionately believe with all my bias that something is true doesn't mean I'm hypocritical. I just want the truth and I really can see both sides of the global warming argument. What causes it, how much damage have humans caused, what are possible outcomes of it, is it realistically able to be fixed or reduced. I think those are the questions that everyone who really cares about the future wants to know. I just want answers like everyone else but I think the global warming alarmists do just as much damage as the deniers in accomplishing that. The focus on answering those questions is lost on who is right or wrong and who is on what side of the fence.