Other means exist. Commonly violate the rule, and you will be regarded as one of the vermin of the community. You should be aware, however, that the Usenet rule lies within the rules of the larger society. What we have articulated above is merely a restatement of a small part of the international law of copyright. The rights granted under copyright are fairly simple and universal.
Enforcement is national and much more complex.
Copyright ultimately expires. We are not going to describe the various limits, except to say that anything composed for Usenet will be still under copyright long after this FAQ is obsolete. The rule has been stated, not raised for debate. When that is understood, we're glad to provide explanations. 1 When you are talking about courtesy to authors, you can hardly talk about granting them some fraction of their legal rights.