We can say that cases before 2018 or something like that are too old for digging if there's nothing else bad about that account.
I would say that if a new precedent is set, then it should be from July xxx 2023. Everything prior should be considered ancient history.
Don't we already have a consensus that if there is a proof of accounts or merits trading then buyer and seller should be tagged? I'm here from the end of 2018 and it already was so if I remember correctly. So it's not about something new, it's about how deep is it correct to dig.
Maybe we can consider other circumstances like if this account is active for years, got positive reviews and made recognized contributions it can be forgiven for old mistakes like accounts trading.
But even if we will forgive anyone it should not encourage hackers to hack accounts. We already have problems with proving that accounts are hacked.
nlovric was banned for plagiarism and got only neutral tags before it because it was not so easy to prove he's not an original owner of account. It was obvious but not 100% proved.