The Dixie Chicks have a movie, Shut Up & Sing, coming out today, and, to keep things lively, they're staging a grudge match with the worst site on the Internet, political-rhetoric division. "The fat chick will only drive traffic to this site," writes one poster to the site. "The Frenchy Chix can't get a gig in a gay bar in Ithaca," writes another. Others chime in with more corruptions: Chubby Chicks, Ditsy Twits, Vichy Chicks. "Yep typical liberals," says someone else. "No character." This is Free Republic, an exercise in political extremism that, despite being and something of an anthropological...