My wager on some of these girls who act completely whacked out during rush (like mute girl) is that they are only doing it because their mom/dad/boyfriend/sibling nagged them into it. They want no part of the Greek life but they don't have the balls to say so...so they sabotage themselves. Then they can go to whoever wanted them to do it and say "well I tried, but I didn't get in...oh well." Kind of like Megan on Felicity being all Gothed out and then going home to her parents wearing Laura Ashley.