Cut out the big words and legalese, you are just trying to distract from the real issue here. No extortion is taking place, you scammed people by pointing them to a supposedly independent escrow service, which was just you. Now, you can either return the extra amounts charged or not. It is stupid to talk about libel regarding anonymous usernames on forums. The only person who has misrepresented the facts here is you, quickseller. For a guy who made a name hunting scammers, you sure have fallen far.

"self escrow" does not exist. An escrow is an independent third party in a transaction. If one person is pretending to be two people in a three way trade, then it is obviously fraud.