I enjoy Viridovrix's posts, and take them seriously. On any forum, any user is going to remember some names as "hey, this guy usually makes something worth reading/talking about," and that's what forums/blogs are all about: an idea, something to play with, a conversation.
In this case, I disagree with his basic premise, which is that hipsterdom can be boiled down to one type of extraversion.
One can be an extravert yet not fully externalize one's values system. One can be an extravert without thinking that arranging external signals makes one into something one is not.
At their essence, hipsters are afraid that we know one thing about them:
They are very ordinary.
They draw attention to themselves, and talk a good game instead of doing anything, because they don't trust themselves with actions.
They're in denial of reality. Oddly, this makes them potential allies, because by going into unverbalized by acted-upon denial, they are agreeing that things are afoot which are bad -- which, in a declining society, is the only useful starting point for truth.
Metalocalypse... I could make fun of any number of things by picking on their weakest link. I don't think it's effective or conducive to a higher mental state, even of comedy.