And this is why snark "works" -- people only care about socializing, not learning or persuading. Snark "works" by reinforcing commonality, stigmatizing difference, and turning disagreement into rivalry. Snark "works" if you're interested in the distinction between "people like me" and "people unlike me" rather than the distinction between your ideas and someone else's ideas. It doesn't work at all if you want to communicate constructively with people who have fundamentally different or alien ideas.

EDIT: I guess I didn't say anything very different from him, but I thought he glossed over the negative aspects pretty quickly. He characterizes snark as an ugly way of bullying people close to you, he says it is "quite possibly a really bad thing and a really bad habit," but he's clearly looking forward to using it. Creepy.