Well, the good news is they won't self-replicate. We still gotta
   build them. Even if they build themselves someday, they'll still
   have factories of some kind. Perhaps swarm AI might be an issue
   though. Nano-sized. They could be an issue, like little robotic
   bacteria in a way. But larger-scale AI should be ok. Keep the
   numbers under control and I think we'll do fine. Fingers crossed
   smile emoticon