I think it would be interesting to build a reputation system like this on top of Ethereum, where each Ethereum address has a reputation associated with it and t

I think it would be interesting to build a reputation system like this on top of Ethereum, where each Ethereum address has a reputation associated with it and the darknet markets simply read that reputation into their UIs. That way even if the market gets shut down and loses their database, the vendor reputation system would still persist.