by Paul Alan Levy
In an opinion issued this morning, the D.C. Circuit unanimously reversed a trial court ruling that compelled several ISP's to provide identifying information for more than a thousand anonymous users who were sued a maker of pornographic movies for allegedly using the BitTorrent protocol to provide access to copies of an adult film. Although not mentioning the First Amendment right to speak anonymously, the panel endorsed two of the key objections that a coalition of civil liberties groups has been urging for the past decade as a reason to limit subpoenas to identify alleged copyright infringers in mass litigation filed against hundreds or even thousands of users of popular filing-sharing protocols.

