I know I sound like a broken record but this is why account selling should be banned.
You clean up the account sellers, with it go the signature hounds, the HYIP and Ponzi aritsts, some massive pumps and shitcoin schemes, organized FUDding, etc.
You do sound like a broken record and I still don't understand how you're not getting it. How would banning the sale of accounts stop any of the above? It wouldn't even make a dent.