I haven't trade with any of the people here much...but extorting someone is a bad thing..This could get the user Lauda in Prison. I think bitcointalk as just a place to chat and learn, i will hardly do any real trade with my real identity here as things like mentioned in OP can happen. Anyways what was the amount in BTC the cut was that the user Lauda was asking?
I have been working in police department and i bet that if our authority pressurize this forum to give data then admin cant revoke it. Better you guys leave this habit of extorting here, Better that no legal complaints are made for you else the day could be worst for you guys.