"A firewall is all well and good, but they're not foolproof."

And then Tatsuo is forced to, in his mind, get slightly unscrupulous.

"And you are risking someone else. When you risk yourself, you risk the other Togusa and his world. So don't stop at the easy answer. Where are these things storing all their data on us? Where are their harddrives? If we can figure that out, maybe we can take that back to Zee instead."