That's bullshit! The TA knows where all the shares are in all accounts at all brokerage houses!
If there are more shares in the accounts than there are in the OS, there are naked shorts! If the TA finds no evidence of naked shorts... there are none!
Naked shares have to be in the accounts of whomever purchased them, no? The TA has records of all DBMM shares in every brokerage's accounts, no?