Imagine A virus/worm that attacks Cisco IOS and Juniper JUNOS (if its not cisco its juniper right?). Once in the router, it messes with the BGP, ISIS and OSPF routes; using sequence numbers maybe? Causing routers to accept routes pointing to null interfaces and propagate these routes to the neighbors....maybe just maybe...
 
But why would you want to ensure skunkworks and the likes are no more?

2009/4/27 Michuki Mwangi <michuki@swiftkenya.com>
Hi Wash,

Odhiambo ワシントン wrote:
>
> Mich,
>
> I still think that shutting down the DNS ROOT Servers will take down the
> Internet, no? Though not instantly.
>

As i had mentioned, it will require the consent of the US Government
amongst and the individual and independent Root-Server operators who are
NOT under USG.

It will take a while if that would potentially happen. Also please note
that there are over 100 instances of Root-Servers globally those would
need to be shutdown too. locations  www.root-servers.org

If the root-server failed am sure a good number of people would revive
the Alternative roots - this were seemingly alternative solutions for
the Root that have died with time as some realities have come to pass.
http://en.wikipedia.org/wiki/Alternative_DNS_root

Bottom line, shutting down the DNS Root servers will break down the
resolution process. P2P and other applications that are non-dns
dependent will continue to function.

Hence it will cripple users ability to access content that they access
through names. But everything else will remain intact.

Regards,

Michuki.