I guess...I just don't get the prioritization of fears here...for decades we've also had the ability to kill each other with anthrax and sarin gas, things that can be dropped from large "delivery ships" and used to kill even more invisibly than these insect-sized drones. Why is it more likely that we're going to develop superintelligent autonomous insect drones than we are to annihilate ourselves with human-controlled mechanical systems, as we've had the capability to do so for many years now (nuclear ICBMs and so forth)?