[A][…] network of centres […] which allow users to report content which they come across in the course of their use of the Internet and which they consider to be illegal. Responsibility for prosecuting and punishing those responsible for illegal content remains with the national law-enforcement authorities.
[A]n Internet provider maintaining a hot-line or other procedure by which subscribers might report objectionable content in the provider´s interactive computer systems would expose itself to actual knowledge of the defamatory nature of certain postings and, thereby, expose itself to liability should the posting remain or reappear.