Following a recent decision from the Sixth Circuit, anonymous bloggers and other Internet users who post third-party copyrighted material without authorization have cause for concern. They may be unable to preserve their anonymity. In Signature Management Team, LLC v. John Doe, the majority of a panel of the U.S. Court of Appeals for the Sixth Circuit established a new “presumption in favor of unmasking anonymous defendants when judgment has been entered for a plaintiff” in…