These reports do not calculate NSS nor do are they able to track offshore hedgefunds that short and transfer their shares from one broker to another so shares don't show up on a reg-sho list.
And just to clarify, broker to broker transactions are reported to DTCC just like any other transaction. And the physical location of where those trades originate is irrelavant.
Anything worth shooting is worth shooting twice. Ammo is cheap. Life is expensive.
If you find yourself in a fair fight, your tactics suck.