The only reason it works for Wikipedia is because everything must be externally-verifiable ("citation needed" and all that). On Wikipedia, trust in the crowd is

The only reason it works for Wikipedia is because everything must be externally-verifiable ("citation needed" and all that). On Wikipedia, trust in the crowd is not only unnecessary, it is actively discouraged. That doesn't work for all situations, and as we can see from this story, bad things can much more easily happen in cases where external verification is not available.