Accounts on sites that require KYC such as bank accounts, PayPal, etc. are assumed to be hacked unless you explain why they're not hacked.
According to this rule mod could ask to prove that account has not hacked. If OP unable to proved then I think mod can take action. Buyer should ask always about account legitimate those are with KYC. If seller not provide appropriate answer then buyer should open thread on reputation against them. So that mod can handle the case.
This rule has been added recently but I do not know why it has not been applied effectively ?, There are some posts about KYC activation[1] or verified accounts that need KYC docs without deleting or asking for proof[2].
There may be needed more clarification and rules about
Digital goods &
Invites & Accounts sections.
I have reported some posts that contain hacked accounts and have been deleted *IIRC*.
[1]
https://bitcointalk.org/index.php?topic=5059814.msg47411833#msg47411833[2]
https://bitcointalk.org/index.php?topic=4998490.0