Zeref wrote:2) I'm sure many government organizations use those private ISP's, if they are shut down, the government would also be at a stand still.
GovNet. Take your school or work LAN, unplug the router's outgoing so that nobody can get in to you, and nobody in can get out to the internet (a.k.a air gapping), then put classified documents on all of the computers and use heavy encryption. Voila. GovNet. Completely unaffected by ISPs being shut down.