Were the San Francisco Vandals Paid Provocateurs?

On a massive day of action like this - there's always a debate over what sort of tactics should be used to advance the movement forward. And although the Occupy Movement has prided itself primarily as a peaceful movement - there are elements within it that have endorsed more destructive tactics. Last night - on the eve of May Day - a group of 50 protestors took to the streets in San Francisco armed with crow bars - splattering paint on buildings, breaking storefront and car windows - and even lighting an SUV on fire. The local occupy movement condemned the vandalism - but it's not the first time that such a tactic has been employed in the background of peaceful occupy rallies. Joshua Holland, Alternet, joins Thom Hartman from Oakland - the site of some of the most tumultuous encounters between the Occupy movement and police.