[NikkiA]

> ask the nice bank lady to type this "magic key combination" for you

If the keys being pressed are not necessary to be specific keys, then you can probably sniff the keypresses from the person ahead of you in the teller's line.

In fact the article makes that sort of clear:

> Alternatively, the hacker could simply observe for a few seconds what the user is typing.

Banks probably still have enough regulation and anti-TEMPEST fear to NOT be using wireless logitech gear though... Well, maybe.