Well, I will be happy when you return to handling escrows. I feel like I'm the one being punished here.
I'm sorry if it really turns out for you this way. Well, I think 4 big escrows gave up, three totally, one is away and probably will stop escrowing, because of the latest developments with master-P and escrow.ms. I think at some point it will push all their escrow users to the remaining escrows.
Unfortunately it doesn't feel actually great to know that there were scammers that worked in the same service section. :/ I think that is one big reason they gave up.
I don't know how you deny escrows but I created some default text for denying trades. I only add some additional info if it sounds like I should. So denying is a fast thing then.
Then, sold accounts should be left a neutral feedback stating account has been sold/changed ownership. This way, people would be aware of it. Many are buying accounts to scam. Gone were the days when they bought accounts to harvest signature campaigns.
Actually all accounts I escrow seem to end up in a signature campaign even when the buyer is an account flipper first. His buyer will buy for signature campaign. It's he one big thing on the forum that seems to spread around as the best way to earn bitcoins for free.
And it would not really help to mark them. Like Quickseller mentions, if a scammer knows that this will happen then he will trade outside the forum again. So he receives a clean account while all normal users will have a mark that surely will mean a problem for them in one way or another.
I think it won't help against scammers.
If, if, if.
And since when do campaign managers care about neutral trust or whether an account was bought?
I'm not sure if they would care. I think more important are posts that are written in a nearly unreadable english. So that it really sounds like the barely english speaking indian mother of a bitcoin user tries to earn an additional salary.
On the other hand, if it turns out bad accepting those users then an account manager might autoreject those users from then to prevent work.
Though the mark won't help against a clever scammer for sure. And most scammers are clever. Not like master-P with his stories everyone could find out. Even trolls on here are clever and know how to trick the tracking of the forum. I doubt any serious scam could be stopped by marked accounts or forbidden account trades.
The only thing that comes to mind, that is unavoidable for a scammer to do, is the password change. A scammer surely won't trust the seller enough to not change the password. So if there is a list of the last 12 months password changes of that account in the trust page then users might have a slight hint that the account might have changed hands. Surely that is no sure thing but it is the only thing that a scammer can't avoid when buying an account. He will change pass to protect his scamming scheme.