Diversity of opinion is a mark of any free society.  Whenever I hear the latest conspiracy theory, see a commercial for a ghost-investigating “reality” show, or hear the latest quack cure advertised on radio, I remind myself that the spread of wacky fringe ideas is a consequence of liberty.  And, though I wish my fellow citizens would develop a bit of skepticism, I wouldn’t want anyone preventing them from hearing, watching or believing all that nonsense. So it’s a major victory when facts fina...