The bank had seen a disturbing trend; before leaving their homes when evicted, the upside-down mortgagees took everything that wasn’t nailed down–and quite a few things that were–and sold them on Craigslist, leaving the bank’s collateral nothing but a shell.  Perhaps, they thought in retrospect, they should have been a little more careful whom they had provided mortgages for.  Gastropods and mollusks had been particularly troublesome . . . .  David, Sf.G.