In case you need any more reasons to change default passwords on your systems...

A separate IT department in the company a friend works for had, while attempting to configure a new SAN which they had just purchased, managed to accidentally access the management interface to the SAN that hosts the main file server (the management tool apparently auto discovers all matching devices on the network). Upon discovering several existing LUNS and being true intellectual giants, they assumed that said LUNS must be factory defaults and deleted them... All of them...

Thankfully the file server is part of a DFS pair so the impact was minimal, but it could have been one of those incidents that keeps sys admins at work 'til the wee small hours running restorathons.