Probably because the account was used as collateral.
As discussed via pm.
-----BEGIN BITCOIN SIGNED MESSAGE-----
Date: 13/03/2015, Friday
This is validium and am in control of this address and am requesting a loan of 0.3 btc from Muhammed Zakir. To be repaid within a week and a half using my account as collateral
-----BEGIN SIGNATURE-----
15LUmGvPLTM3pHMw7qBj7yhjnMhbD9JFKH
H7up/sdhQvFw09nZ2rnN6at13LInHVEYPN95/epfi5EBNtQr/SWr59PeUM9jenHzHSS9kk3Pg50dZFw1OiBmmFw=
-----END BITCOIN SIGNED MESSAGE-----
Exactly, Zakir even addresses this in the thread:
P.S. Can I change address of your account so you can cover some of the loans with Bitmixer payment?