-snip-
That's actually contradicting with one of his points. If you guys do this, then that will bring the trades for negative trusted accounts more and more popular(Thus bringing the prices for negative accounts up), because there's a pretty simple way of getting rid of the negative trust.
I dont think contributing in a positive way for 3-6 months would be considered simple by most, especially if they try this as a business model to redeem accounts. Its also only possible for those that got negative feedback as a warning, not for actual scammers.
-rephrasing-
Any buyer of negative trust accounts should get negative trust as they are helping a scammer.
But the account in question did not scam to the best of everyons knowledge they just tried to or arguably have bad trading practices.