Since the Internet has been available in schools and libraries in this country, there has been a debate about what should be accessible to users, especially minors. The amount of information disseminated on the World Wide Web is vast, with some sources valuable for academic and personal research and entertainment, and some sources containing material objectionable to some (e.g. pornography, gambling, gang sites incite hatred, violent materials). . Some information potentially accessible on the Internet, such as child pornography and obscenity, is strictly illegal and is not protected by the First Amendment. Some information available on the Internet that might be valuable to some is at the same time perceived as useless or potentially harmful to others. For libraries serving the public, there has been controversy over the issue of providing the Internet, free of censorship or filtering, to users. While some librarians and their professional associations align themselves with the ideals of free and unfiltered access to all information provided by the Internet, some believe that filtering Internet content to exclude potentially objectionable material is a reasonable measure to prevent potential harm to minors. Legislation In 1998, a Virginia district court issued a ruling on the use of filtering software in public libraries that set a precedent for the unconstitutionality of Internet filters. Todd Anten's article, “Please Turn Off Your Entire Filter: Why Nonremovable Filters on Public Library Computers Violate the First Amendment,” provides an account of the ruling. The Loudoun County Library had instituted Internet access restrictions on all library computers with software that blocked sites that "displayed obscene material, child pornography... medium of paper...ronics-computers/resource-center ". /internet-filtering-software-605/overview/index.htm?resultPageIndex=1&resultIndex=1&searchTerm=filtering%20softwareGottschalk, Lana. “Internet Filters in Public Libraries: Are They Part of It?” Library Student Journal 2006: Vol. 1. Accessed March 31, 2008. http://www.librarystudentjournal.org/index.php/lsj/article/view/25/18“Guidelines and Considerations for Developing an Internet Policy in Libraries public". American Library Association. 2000. American Library Association, Office for Intellectual Freedom. Accessed April 1, 2008. http://www.ala.org/ala/oif/statementspols/otherpolicies/guidelinesconsiderations.cfmHolt, David Brian. “Internet Filtering and the Adolescent Gay/Lesbian Patron.” Library Student Journal 2006: Vol. 1. Accessed March 31, 2008. http://www.librarystudentjournal.org/index.php/lsj/article/view/28/25