I have one question. Are there cases on the forum when an honest user is framed by scammers.
If you aren't asking specifically for your example then here is a situation when framing happened and it got resolved but it doesn't happen more often.
I just stumbled upon a proven case of framing someone for plagiarism:The scammer can take the original text from the forum, post on his website changing the date and write a complaint, and also delete it by editing it. We need to study this problem.
Back to your example, For example, <***>
The account tagged has to try his best avoiding tagging by other members and appeal the tagged from the user that framed him then expose scammer with valid evidence when he try to ask for a random or give a reason why he framed you, you should also open a thread trying to convince DT members on Reputation board that the transaction was done without your concept
feedbacks which aren't from DT members have little effect on your trust score that's why you have to focus on convincing DT members you're been framed so you don't get tagged by them.