Anonymous remailers protect speakers from retaliation. The Founders used anonymity, as the pseudonymous writings in the Federalist Papers show.
Granted, some anonymous posts are drivel, some are even illegal.
So?
The Antifederalist writers used pen-names too, and recent events make thier arguments interesting. http://colossus.net/wepinsto/rot/afp/index.html Index to the Antifederalist Papers Antifederalist No. 1 GENERAL INTRODUCTION: A DANGEROUS PLAN OF BENEFIT ONLY TO THE "ARISTOCRATICK COMBINATION" Antifederalist No. 2 "WE HAVE BEEN TOLD OF PHANTOMS" Antifederalist No. 3 NEW CONSTITUTION CREATES A NATIONAL GOVERNMENT; WILL NOT ABATE FOREIGN INFLUENCE; DANGERS OF CIVIL WAR AND DESPOTISM Antifederalist No. 4 FOREIGN WARS, CIVIL WARS, AND INDIAN WARS - THREE BUGBEARS Antifederalist No. 5 SCOTLAND AND ENGLAND - A CASE IN POINT Antifederalist No. 6 THE HOBGOBLINS OF ANARCHY AND DISSENSIONS AMONG THE STATES Antifederalist No. 7 ADOPTION OF THE CONSTITUTION WILL LEAD TO CIVIL WAR Antifederalist No. 8 "THE POWER VESTED IN CONGRESS OF SENDING TROOPS FOR SUPPRESSING INSURRECTIONS WILL ALWAYS ENABLE THEM TO STIFLE THE FIRST STRUGGLES OF FREEDOM" ....