Earlier this week, the federal government's National Science Foundation, an entity created to encourage the study of science -- encouragement that it achieves by awarding grants to scholars and universities -- announced that it had awarded a grant to study what people say about themselves and others in social media. The NSF dubbed the project Truthy, a reference to comedian Stephen Colbert's invention and hilarious use of the word "truthiness." The reference to Colbert is cute, and he is a very funny guy, but when the feds get into the business of monitoring speech, it is surely no joke; it...