So, this made its way into the mainstream press:
Hacker Holds Key to City's Network
An Alleged Hacker Won't Reveal Secret Password to Unlock San Francisco's Network
http://abcnews.go.com/Technology/story?id=5390020&page=1
Yeah, so I guess they've never heard of single user mode, or the equivalent for Cisco IOS. If you have access to the hardware, it takes about five minutes to reset the master password.
Repeat after me:
Physical Access is Total Access
Physical Access is Total Access
Physical Access is Total Access