Zepher gone away months ago, but Lutpin has still posted recent weeks. He has been less active than before, but still logged in and posted. I think Sportsbet.io can ask him change his neg feedbacks through PMs. For Zepher, why not ask admin to replace that feedback, or change it with a note that feedback edited by admin because Zepher gone and case solved already.
Admin edited thread of Hal Finney, and left a note at bottom.
I think admin or global moderators will take this case of Zepher into consideration.
Admins don't intervene in the trust system unless it's trust spam or advertising in trust walls. To get Zepher's trust deleted/not shown by default, one would have to either hack into his account, or convince the DT1s to exclude Zepher so that they have a net exclusion on DT2.