I think EcuaMobi should be acknowledged for sticking up for OgNasty when it is clear to anyone paying attention that he does not like him.
I think Vod should take the loss, and remove the counter rating for OgN -- it is not appropriate. I am not aware of anyone paying back a $400k loan, or paying out $400k in real money (not counting tokens whose value can trivially be revoked) out of escrow without there being any kind of dispute. OgNasty paid out an amount 10x this without any dispute that all money has been returned (arrangements have been made to return the various forks with sufficient value that will be returned in the near future).
If Vod is aware of OgNasty scamming, embezzling money, or doing something else that would reasonably make him a scammer, he should leave OgNasty a negative rating, and open a scam accusation. If Vod can present credible evidence that is not refuted that OgNasty is a scammer, I would gladly take Vods side. Based on my observations of OgNasty, including how he conducts business, I don't think he is a scammer, and would be surprised to see unrefuted evidence that he is a scammer.
I do think the trust system needs to be changed/upgraded (again). The current implementation is causing a lot of friction among many long standing forum members, and is harming the community. Perhaps something along the lines of what LBC uses could be implemented -- that is there are no trust scores, only comments, and comments can be filtered by positive, negative, neutral, and can be further filtered by those in your trust network. As an "early warning system" to warn against scammers, the "trade with extreme caution" warning could be displayed under certain circumstances that varies depending on if the person has existing, prior positive ratings. It should also be limited as to when someone should be able to leave a negative rating.