I'm surprised that no one commented on the pseudo documentary's shaky reality as mirroring the problematic reality of the Idiots in the movie. Their attempts to be real idiots so as to appreciate their "inner idiots" parallels the feature film's attempt to mimic the documentary format so as to achieve credibility. By showing the overacting and crew shots in the movie, perhaps it was the director's way of commenting on the the shaky reality of the Idiots existence.
But even though we know that it's a feature film trying to be a documentary, we are still drawn to the vicarious experience of the movie - we still enjoy it as a movie. Perhaps another statement about finding happiness in a fake reality?
Like Idiots, the audience goes into an escaped reality when they go to the cinema, hoping to experience what the protagonists feel on screen. But like the idiots, the denial is only temporary. The final fate of Karen seems to warn the the audience that at the end of the day, this escaped formed of reality is no match to the "real" world that is out there.
