If you shut down the internet, bad things will happen…

The Gibe-F worm, an e-mail-transmittable virus, initiated cascading server failures. Within an hour, Internet service to more than 90 percent of the U.S. was disabled, either by the worm or by network firewalls that initiated security protocols.

“Unlike SoBig or Blaster, this worm didn’t harm individual computers; it just used them as a gate to attack the Internet at the ISP level,” Kessler said. “Computer technicians at most offices couldn’t do anything but sit by helplessly as people worked through stacks of filing, wrote business-related letters they’d put off for months, and sold record amounts of goods and services over the phone.”