I guess it must be used for building a reputation system. Google pretty much knows who published what first (or has at least a reasonable idea of that). If the

I guess it must be used for building a reputation system. Google pretty much knows who published what first (or has at least a reasonable idea of that). If the re-publishers lie with their metatags, or at least lie consistently, they get punished with a deranking. Edit: oops adbge was there first, sorry.