A Vendor just posted today a detailed report, explaining how to blue sky marketplace owners tried running imposter accounts of known vendors in order to scam buyers into trusting their old vendors, the owners even had the nerve to post the PGP signed message that the vendor sent support - right on the vendor profile page, that was also copied from SR1 (original thread here: http://silkroad5v7dywlc.onion/index.php?topic=12591.0;topicseen)
http://www.deepdotweb.com/2013/12/30/bluesky-market-scam-attempt-warning/