|In defense of the genre|
Most of the film is simply interviews with comedians, footage of hecklers from shows, and the occasional interview with a critic (ie. professional heckler). There's some funny stuff in here, but it also brings up a big problem I have with criticism, and that's attacking the person directly rather than the work. You can hate Son of the Mask all you want (and you should); you can say that Kennedy's performance in it is awful (and it is). But why the need to visciously attack the man himself? This documentary proves that even the most smug of comics have feelings and that those can be hurt like anyone else's.
Beyond the critic aspect, the idea of heckling at a show is simply disgusting. It's nothing but disruption and childish distraction from the person that people paid (or at least got free tickets on the radio) to go see. Usually comics can rebound from this, see Patton Oswalt's great rebuttal on Werewolves and Lollipops. But in some cases it can derail a whole show, turn the audience against the comic, and worse. And they don't deserve that. Even the smug ones. Well, except maybe for Tom Green.