Greece rioting to come to the US??

Will the union members calling for "more activism" in Wisconsin resort to the rioting being seen in Greece. For those not following Greece, the Greeks are near a default on their sovereign debt brought about by massive social programs and government union employment. As the political leaders have been forced to take austerity measures, i.e., cutting pensions, salaries, and jobs, the unions have rebelled, rioting in the streets and fighting with riot police. Many believe Greece is approaching civil war if not a breakdown of society. Is this what the US will see as its political leaders attempt to rein in public spending and overly generous union salaries and benefits?