We've noted in the past the similarities between mass IP infringement trolling lawsuits and shakedown scams -- and have even seen some out-and-out scammers mimic the techniques of copyright trolls. Torrentfreak now reports that some scammers are specifically targeting Megaupload users, pretending to be lawyers demanding payment for infringements on Megaupload. While these are pure scams, given the MPAA's own statements about possibly suing Megaupload users, combined with the success rate that copyright trolls often have in getting some people to just pay up, it seems likely that a fair number of recipients of such a scam letter are actually falling for it.