airtren,
Ah right, I didn't spot it was to do with the ISP password.
Someone snooping on a wire in a home between the laptop and the router could be quite a stretch, particularly when happening in the same room and a short wire.
Depends if we're getting into TEMPEST tin-foil hat territory.
Rumor has it that it's amazing what you can pick up by reading the blinking transmission light on an ethernet port.
However I would say this is the more likely form of attack :
