[jpstory]

There are three classes of Bluetooth(0). Since the module is hardwired into the PCB within the ATM, there are no power concerns, so Class 1 (100m range) would work just fine, and easily escape the partially metal confines of within the ATM (as others mentioned, through the screen is one possible avenue).

There are no steps to protect his identity simply because the reputation he's built up for many years as an infosec journalist is that of a badass. You said you don't have time to review all his work, maybe if you did you'd be able to answer your own question on his motives to not hide in the shadows or behind a mask (its because this is his livelihood and reputation).

No appeal to authority, just the facts as I see them. Not sure what Lance has to do with this, but you seem to be reaching for straws.

(0)https://en.wikipedia.org/wiki/Bluetooth#Uses