Pseudonyms in History

The recent hubbub about the blogger code of conduct got me thinking about pseudonyms, which the "code" condones. I like pseudonyms. That's one of my favorite things about the blogosphere. Many historical figures have used pseudonyms, and I think it is a long and noble tradition: Silas Dogood (Ben Franklin), Voltaire (François-Marie Arouet), Mark Twain (Samuel Clemens), and Publius (Alexander Hamilton, James Madison, John Jay in the Federalist Papers) to name a few.