If he admits the truth I am think most people would remove negative feedbacks, but I don't see anything wrong with neutral feedback in this case.
Nothing wrong with the neutral [not something looks good too when there are such context there] but a red seems very aggressive. And the way bunches of people chasing the account it seems they are trying everything to justify the red because it's already left there and it has to be there.
Try to give a guy the benefit of doubt and more and more just keeps popping up. My feelings on the matter of account sales still stand though, neutral unless a reputable account is the route I would take. This particular case just gets worse every minute unfortunately.
I know I couldn't be more sure about the fact that he is making up all those stories, and it's more than likely that he bought the account, but with all due respect to the fellow DT members who tagged him negatively I don't think it's justified, if I were a campaign manager I probably wouldn't hire a bought account with the assumption that if a person can't build his own account -- he would unlikely benefit the campaign, but on what bases do I think that person is untrustworthy or a scammer?
Let's just pretend that someone manages to prove that the "theymos" account has changed hands 7 years ago, and the real "theymos" died and passed it to his "brother", are we going to tag the account? is it really the person behind the account that matters or the account itself? to me, it feels like the tags on his account judge the person rather than the 'persona' that currently operates the account, it's like we know that the real person behind the account 1miau for example is not a serial killer in real life

, we don't, but via his posts and my interactions with him, I know that his online-persona is to be trusted. So if someone proves that 1miau is a terrible person in real life -- that wouldn't change my point of view in regards to 1miau's forum persona.
Now begs the question, has martyns committed any scam or untrustworthy behavior after the day he got his hands on the account?
Everything can't be written better than this. Well said.
To answer the question, he hasn't looking from the feedback history which was empty before this topic created. So it does not warrant any red feedback. Will he scam in the future? That will be a stupid question to ask. All I see is the account is doing everything to earn from signature campaign.