No reputation or information is a recipe for meaninglessness; as a reader I have neither the time nor the tools to fully evaluate every statement ever made to me; I must use heuristics to aid my reading (e.g. I will almost certainly ignore anyone who claims the moon landings were hoaxes; it's not worth my time to investigate his claims).

I'm actually very excited by the idea of anonymous reputation, as it could enable all sorts of the things needed to have a well-run global network without enabling physical assaults on persons.