The second problem here is that there's an assumption a cyber-attack will be sanctioned by some malicious government. Chances are it won't be, it'll just be those pesky programmers from the old Eastern-bloc that suddenly found themselves out of work come the revolution.

"What shall I do today? I could go and be a laborer for that company building crap houses for the westerners to buy and screw my economy over a bit more... or I could cyberbomb the US! Darling, bring my my laptop."

You don't carpet bomb RofI or the Basque country because you think there might be seperatists there. I suppose you do carpet bomb Afghanistan, but at least you can go someway to proving more than a passing sympathy between the government and the organisation that blew up your trade centre. The whole world is skating on ice at so many levels, but I'm alright Jack.