Though it is not about bloggers or blogging, it is still a great one ;-). In any event, I found it in P.Z. Myers' blog, Pharyngula. And, it is from "The Last Will and Testament" of Philip J. Klass, whom Myers calls 'the famous UFO debunker':
To UFOlogists who publicly criticize me…or who even think unkind thoughts about me in private, I do hereby leave and bequeath THE UFO CURSE: No matter how long you live, you will never know any more about UFOs than you know today. You will never know any more about what UFOs really are, or where they come from. You will never know any more about what the U.S. Government really knows about UFOs that you know today. As you lie on your own death-bed you will be as mystified about UFOs as you are today. And you will remember this curse.