Idol authenticity?

I'm watching "American Idol" as I write this (please forgive me), and something about it has bothered me (past seasons as well). And maybe I should say there are many things about it that bothers me, but I'm going to bring up one in particular. In the later half of the show, they show a little bit of strung together clips of losing auditioners singing the same song (tonight's was Lionel Ritchie's "All Night Long"). This montage includes some of the losers that stormed out in high emotion or in a rage. So I'm to believe they were willing to come back to sing a little bit for comedic purposes? Or do they film that song before the people audition? It all seems a little phony to me. I don't doubt that there are people so delusional that they think they've got a chance when they can't sing, but I suspect that a lot more of them are phonies or plants.

Plus, I think that Ryan Seacrest might be a muppet.