DT is not a unified front.
Indeed.
There is no any sort of obligation to leave feedbacks. You can leave feedbacks. You can bring it to their/others notice (which you did.). That is it.
Exactly. It seems that there are quite a few misconceptions regarding the trust system. It is not really possible to effectively tag everyone doing X (even if one wanted to).
Tagging accounts red for participating in legit account sales is pretty much just making a whole economy riskier to scams and fraud because you can't deal with trusted people and at the same time hampering the legit lending economy forcing trusted lenders to go underground to complete their business..
Step 1) Don't trade accounts. Step 2) Enjoy the reduced amount of spam and scams.
I wish account selling was banned, alternatively the post count could be reset, as it is not relevant to the new "owner".
Unfortunately it isn't.