Usenet Moderation
You have found the way to Moderation on Usenet:
Landfield.com: NetNews Moderators Handbook - Manual on how to moderate newsgroups. Explains technical requirements, how moderated groups work, and offers advice on how to handle various aspects of moderating.
Landfield.com: USENET Moderators Archive - A collection of software and scripts for handling moderating duties. Most of these software are unmaintained but still of interest.
Moderated Newsgroups FAQ - Text format. Explains what moderation is, how it works, issues regarding moderation, and requirements for becoming a moderator.
Pitfalls of Newsgroup Moderation - Describes some of the difficulties one can run into in maintaining a moderated newsgroup. Recommended reading before creating a moderated newsgroup, or converting the status of an existing newsgroup to moderated. Maintained by Russ Albery.
S.T.U.M.P. Robomoderator Program - A flexible, open source auto-moderation tool which allows Usenet news group moderators to partly or completely automate their tasks.
Usenet Volunteer Moderators - A group dedicated to helping moderate Usenet newsgroups and help others that wish to moderate a newsgroup themselves. Help build the largest human-edited directory on the web.