Back when accounts were being used for collateral who do you guys think were the main sellers? Old lenders of course. How many of those old lenders would people tag now for sales? Since we are discussing equal laws.
AFAIK past and present already different.
I check on many accounts which receive negative feedback from DT members were mostly about spam, merit exchange etc. That's not correct to leave negative feedback with such reason. If someone spam, just report it to moderator. If someone exchange merit with his alt, just leave him a neutral feedback.
I think due to high paying bounties and long term Bitcoin signature campaign, make people tend to spam and the rules are getting more stricter to prevent from someone milking the forum.
Now back to your question about buying and selling accounts, I think we need to agree if each person has his own judgement, right?
I will say if someone really think it's right to leaving negative feedback due to changed hands even the account has no reputation, then do it. If someone not really sure if that's case is deserved to get negative feedback or in grey area, just leave a neutral feedback.
Then if you think that's account shouldn't deserved to get negative feedback, you can distrust them.
I just want to add the thread you mentioned before is
fall to cheating in a campaign which deserve to get negative feedback