The dude just seems like an awkward engineer that is a little nervous/scared/whatever at congress (like, let's be honest, who here can stay calm at congress getting grilled)
Agreed. I think the attitude to Zuck is just a different form of old fashion bullying of nerds and it should probably be discouraged.
Complain about big tech business practices, complain when a business leader does something horrible but if you complain about a nerd being 'nerdy' i don't see it as much different to the stereotypical bullying of nerds that should be discouraged at every turn.
Having a smile by your mouth and not by the rest of your face especially the eyes, will make the face more creepy and signaling those psychotic serial killer vibes.