It doesn't, and it matters about as much as the shit-stirring alt account itself, which is not very much.

I think issuing a positive counter-trust to such an account is an over-reaction; perhaps worse than Yoshie's neg tag on a throwaway account.

This Fact Finder account was created purely to stir shit. If they had honest intentions they would have just posted from their main account.

Just because someone creates an alt account to "say things that can't be said from a main account", it doesn't mean what they have to say is at all valuable or relevant.

If someone walks into a room wearing a mask, says "I'm doing this to protect my reputation, I don't want to be criticized," and then proceeds to smear feces all over the walls, they don't have the right to be thought highly of.

It's a low blow to hound a guy over a loan when the lender has expressly made clear that it's all good. And I definitely would not label OP's behavior as "trustworthy."

Is Yoshie/JollyGood/Timelord's use of the trust system proper in this instance? Probably not. But its not like they are not dissuading the next Vitalik Buterin from participating in the forum. This person was likely issued a red trust by Yoshie on another account and now they are trying to get revenge. It's a blind stab at retribution that is totally tactless given Yoshie's situation.