This could be pointed as an trust abuse, you could make the tag neutral, until it is proved. Yes, negative trust would not effect me, but you know it shows bad repo of a person and I cannot bare it as I have not done anything scammy here.
What would you need the reputation for?
Like you said, it wouldn't [effect] you.
A negative rating stands out to those that would do trades with you. Given the possibility of a compromised account, it's better to guard against anything in the event that a new owner
does scam.