General problem of tracking an entity's reputation (credibility). Based on a Trust Metric.
Some notes from the Earth Web Book
See MeatballWiki:ImportanceOfIdentityInOnlineCommunities, although the context there is more focused on a community, meaning information is about/by members, whereas Company Fuckers has a messier time, because information is about typically external 3rd parties (who may have no publicly known Digital Identity!).
Things (2011) to consider when designing one.
Annotation Systems seem potentially useful.