That's not a new scam, there is even a sticky on it.
It's a new MSN exploit, where msn+ users use the "mimic" command to imitate someone's name, typing style etc. exactly.
That way the MM in question gets confused and might hand the money to the other party, and thus unwillingly help in a scam.
I was one of the first victims to the mimic, it was tried on me and Yakov with some mills buyer.
It costed me 7m in MM failure fees..
Yakov banned him eventually, and there's a thread about it. Yet still people fall victim to it quite often.
yakov threatening people.. what a bad example to noobs like me