If you don't read Roger Ebert's blog, you probably should. In recent years (and probably before that, but before blogs) he's been writing some of the most thoughtful posts I've seen on a range of topics, from politics to science to, of course, movies. His recent post discusses "The Big Lie" that is Sarah Palin's "death panels."
Update: The comments are well worth reading as well. Roger does an amazing job of remaining polite while concisely slapping down the rudest of the crazies who stop by for a fight.