Maybe the OPs question should have been
"What can the state do?"
it would make for good starting point for an analyses of possible state/supra-state attack possibilities upon bitcoin.
There's plenty of documentation available about what governments do when they go full retard.
This is what's happening
right now in Argentina, for example:
The government claims inflation is 9.9% and has outlawed calculating or quoting any other inflation rate. Forty percent of dollar deposits have been withdrawn from Argentina since last October. Now there are capital controls. You need special permission to move your dollars overseas.
To take a foreign vacation, Argentines have to apply to a bureaucrat for permission and explain where they got the money for the trip. And there are rumors that it will be made illegal to talk about the existence of the shadow market exchange rate for dollars.
If you pay in dollars, you could get 25% off the price of property. The government has outlawed this, making the buying and selling of real estate in dollars illegal. Just one more rule Argentines will find their way around.
The government claims that the rate of outflow has slowed. But with every passing week, companies and individuals figure out new ways to get their cash out.
But they continue to do incredibly dumb things. Two years ago, President Kirchner seized private pension accounts. Now she is going to lend $4.4 billion of this money, at a rate of one-tenth the inflation rate, to new home buyers. A lottery will decide who gets the loans – not capacity to repay.
If you want more examples this list should provide a good starting point:
http://www.munknee.com/2011/03/21-countries-have-experienced-hyperinflation-in-last-25-years-is-the-u-s-next/Argentina sounds like it is being run by a desperate, paranoid, jealous, suspicious woman ....
