But that's my point. Someone who is presumably reasonably clueful had
a problem determining what a predefined default password for a given
device is. If it's difficult to determine THAT, what sort of chance
does an engineer/admin have when he doesn't even possess the manual for
the device, and it requires some more clever and sophisticated serial-
number based method?
The fact that someone has purchased some extremely expensive device does
not guarantee that the next guy who has to run it will magically be able
to figure it all out.