The easiest way to join MLG (and trust me a LOT of people take this option) is the following:
1) Buy a lag switch, a Hori rapid fire controller and possibly use an aimbot. This is something MLG players do to make sure they always look really good online; even though they have no skill at all. If it looks like you going to lose or are still getting rinsed despite all the stuff you've bought - pull the Ethernet cable. MLG players often maintain there win/loss stats with this strategy.
2) Buy the MLG gamer pics. Undortunately you'll line the pockets of morons by buying these but they're needed in order to make sure people know that you're with MLG (and therefore more awesome then them).
3) Don't forget to mention you're with MLG in your profile; along with a long list of irrelevant mostly fictitious stats that prove how amazing you are at all the games you've played.
And you're in - it's that easy!
Just don't forget to play extra aggressive and very cheap to ensure you're opponents have no fun at all. Ruining online communities with overly aggressive, cheap playing is the foundation of the MLG ethos.
Maybe one day I'll be amazing enough to be judged by worthless nothings on my ability to play a game in order to join MLG. Until then I guess I'll have to settle for just playing with my mates and having fun tonnes of fun. Good luck with your screening process, hope the interview goes well.