Professor Marketa Trimble presented these materials at the Def Con 19 Conference in Las Vegas, Nevada on August 7, 2011. The presentation discussed what the law has (or does not have) to say about evasion of geolocation or "cybertravel" -- acts by which a user makes geolocation tools believe that he is physically located somewhere other than where he is located.
Trimble, Marketa, "The Future of Cybertravel: Legal Implications of the Evasion of Geolocation -- A Presentation" (2011). Boyd Briefs / Road Scholars. Paper 12.