I think it's a given that any person who would volunteer to be on a show that claimed to be searching for America's most beautiful person would have to be incredibly vain to start with.
I kind of disagree...some people would be into that for the $100,000 and potential lucrative future opportunities. I have a few friends who are models (most of them just heartbreakingly beautiful, one of them weird-looking but very long and underweight), and they're not vain, but they ARE interested in capitalizing on assets that will allow them to make a decent living.
This show really could be designed much better. What they should do, in my opinion, is not have looks factor into the equation AT ALL. The way they could do that would be by not eliminating anybody, tallying up the scores, and then revealing the show's secret to everyone all at once in the last few episodes. The eliminations are either going to be too appearance-based, or they'll make everyone suspicious. Also, people's behavior over the full series would be a lot more revealing about their "inner beauty" than judging it after one episode.
I don't think swearing at people who tell you you aren't pretty because of some weird, Nazoid eugenic measuring "science" experiment conducted by a doctor who mutilates healthy people for a living is a sign of inner ugliness. And, I spend more hours a week on volunteer work and activism than many people spend sleeping, I genuinely like people, and I try to stay openhearted and honest--but, I have to admit that I would've read every last one of those files! I mean, a) I hate to sit in a waiting room with nothing to read and b) what could be more fascinating?
In the same situation, I would not read through, say, a friend's psychiatric or medical file, because that's personal. And I've never read someone else's private letters or journal, even my ex-boyfriend's, even though I really wanted to! But uncovering the dynamics of a game show in which I was a guinea pig by comparing my file to the others'--especially knowing we've signed off our rights to privacy--doesn't seem to me to be particularly morally bankrupt.