I don’t know. I think we’ve just been nudged past “that awkward stage”.
See this: http://www.youtube.com/watch?v=eZA0qNsf4m0&feature=pyv&ad=3723781624&kw=dollar
When people are starving, then there will be action against the government and its policies. As for something happening before there is major starvation in American cities, I do not know.
As an interesting tangent though, the Constitution defines Treason as levying war against the states or giving their enemies aid and comfort AND Washington DC is *NOT* a state. Therefore an armed invasion/siege of Washington DC by the People would _NOT_ be treason. (Sedition, maybe; but NOT legally treason.)