Moderation

Definition

(main) Moderation provides means to tell apart if a given resource is worthy.
(follow up) Moderation most frequently is for the community as a whole, but might take into account each user/group affinity.
(follow up) Moderation might apply for shared annotations, as well as for annotated resources.
(follow up) Moderation might be simply removing/hiding unwanted resources, but also giving them an score and calification tags, so its visibility can be customized per user (as in SlashDot).
moderate @ dictionary.com: kept or keeping within reasonable or proper limits; not extreme, excessive, or intense

minority thinking is scorned and discouraged. It is possible that the main stream of thought might be wrong in some ways. In community based moderation system comments which go against the stream (e.g. Intellectual-Rights supporters in forums frequented by free software advocates) might face an unfairly high quality threshold for their comments, and will underscore on the lightest excuse.
(posible solution) Moderation might be reached from several sources. A minoritary sector might hold their own moderation service to ensure their comments are not voiced down for people interesting in them. Though, fragmentation might not be a good thing. On the other side, convincing partisans to mantain their own sites, might be useful to form a federation of annotation servers (instead of an overloaded and given-for-granted unique server).
(posible solution) Users might show some affinity or antagonism to scores provided by specific users. With that information the system might learn which contents are more relevant for a given user. Though, this requires more processing, and handling preferences data that some users might consider private.

Instead of relaying on the bulk of the community, moderation can be done by a group of authorized users, whose quality of moderation might be better.
Those users might be selected by the administration (specially if some policy must be enforced); or might be picked within the community, whose aportations are deemed more valuable (e.g. StackExchange).

The system might blacklist users and IPs
The system might filter publishing in several ways
- Might forbid publishing of URLs and words considered as bad
- Might process published video/images in search for copyrighted material
- Might throtle down the activity of potential offenders