Abstract: The authors are studying Internet filtering worldwide, primarily in the context of affirmative actions by governments to restrict the sites viewed by their respective users. We are also interested in requests or demands to private parties that they assist in preventing particular citizens' exposure to locally unwanted or illicit data or activities. A well-known example is the attempt by the French judiciary, acting on complaint of a French NGO, to prevent those on French territory from viewing Yahoo auctions that include the display of Nazi memorabilia, and Yahoo's response.