With more and more frequency the newspapers are reporting instances of school children distributing disks of pornographic images which they have downloaded from the net and recently a university student was found to be operating such a site for material. On November 11, an Associated Press release (Phillips,1994) reported that Carnegie Mellon University had decided to block its users from accessing sexually explicit materials through the Internet: the university's president feared that the university could be prosecuted under state pornograph ....