regarding the video: What's wrong with machine guns? I want one. The kid wasn't paying attention. He asked the old guy questions that the old guy had already answered.

Regarding 'nanofabricators'. In Science Fiction, which I read a LOT of, they have been called 'cornicopia machines'.

When individuals have nanofabricators there WILL be no society. There will be no need for one. Everyone will be completely autonomous.