Glenn Beck, the hottest right-wing voice on the air, worried aloud to his listeners the other day that powerful, sinister forces trying to destroy America might soon "shoot me in the head." But there's fear among his critics, including calmer conservatives, that the victim more likely will be one of Beck's many broadcast targets. After a summer of mob anger at town hall meetings on health care - some of which featured gun-toting protesters - and a burst of Beck-fanned hysteria over President Obama's back-to-school speech last week, the former top 40 deejay has emerged as a goofy dark prince...