lol I think you should at least wait til the end of the game before criticising 1.g4. You can lose pretty quickly if you're not careful. It's not well thought of, but it's dangerous and it doesn't lose by force. 1.f3 is probably the worst first move you can play (it weakens your kingside and hinders development), but even then there's only so much damage you can do on your first move.
Player Archetype: The OMG 1. g4

Michael Basman used to play the Grob to great effect and against master class opposition.
http://en.wikipedia.org/wiki/Michael_Basman
I wouldn't worry about your "OMG 1. g4" opponent, he has already displayed his lack of manners and intelligence.

"two legendary pringer X's? What are they doin' here, dood?" you can mount a defensive fortress on your kingside, which I invented and has g4 as the first move.
Please warn me about anyone you consider an OMG 1. g4 type player. PLEASE!!!
NOTE: For you advanced players, substitute any less-than-great move for 1. g4.
Anyway, without any further ado, here's an introduction to the:
PLAYER ARCHETYPE: OMG 1. g4 (henceforth known as "OMG") versus me
Me: 1. g4
OMG: OMG 1. g4 hahahhahahahhahahhahahahahahaha
Me: What?
OMG: 1. g4
Me: What's the matter with that?
OMG: ROFLMAO
Me: I don't get it.
OMG: liek seriously you don't know that 1. g4 sucks
Me: No.
OMG: hahahahahhahahahahahahaha
Me: What's so funny? I have to move SOMETHING on the opening move, right?
OMG: yeah but not that
Me: So what should I move?
OMG: figure it out your own self d00d
Me: (takes back 1. g4) 1. f3
OMG: spits pop out nose
Me: NOW what?!
OMG: that's just as stupid as 1. g4
Me: Why?
OMG: liek, if u don't know, u should totally quit chess. here's a paper.
Me: A paper? What for?
OMG: for u to like, resign
Me: What? No way. I've barely even made the opening move!!!
OMG: u are not going to last long
Me: That's what you think, "d00d".
OMG: oh yeah? I can totally beat patzer who starts with 1. g4 or otherwise
Me: What's so bad about that move, anyway?
OMG: i can't believe u don't no
Me: That's it. I'm not playing chess with you, no matter if I'm bad...
OMG: good that way it won't be waste of my time (checks forums): o, r u looking for a chess coach? kan i be ur chess coach? u sure need one...
(OMG sees that Shakhmaty is no longer logged into Chess.com at the moment.)
THE END