LEONARD PITTS, JR. – The death panels are back. Sarah Palin’s vision of a dystopian society in which the elderly and infirm would be required to justify their continued existence before a jury of federal functionaries has been widely ridiculed since she first posted it on Facebook three years ago. It was designated “Lie of the Year” by Politifact, the nonpartisan fact-checking website, something that would have mortified and humiliated anyone who was capable of those feelings.