Yeah, this is not gonna happen. Since buying/selling accounts is usually for shady reasons, nobody would say that publicly, since red tag will follow sooner or later.
Exactly my point! Account selling should be discouraged in all means hence, I came up with that thought knowing it won't be possible to publicly publish such announcements.
You seem to have missed what I wrote above that, so I'll quote it again:
As it was said multiple times in the past, if the forum would disallow this or would impose some more difficult rules, people will just sell their accounts somewhere else.
So declaring it "against the rules" would do nothing good/useful.
On the other hand, the risk of getting red tag on those accounts (i.e. the accounts that changed hands) is quite a discouragement, isn't it?