If that is all you're linking to, other people commenting on the same video, who weren't there themselves, and can't attest to the fact that rocks, glass, or snowballs were ACTUALLY thrown because they saw it because they were there or participated in doing it themselves, then it's no different than discussions concerning the SAME VIDEO and discussions being made on THIS thread.
From post number 33, page 4 of that thread:
Peace&Freedom Peace&Freedom is offline Senior MemberSUPPOSEDLY this happenned last night, and SUPPOSEDLY these are real Ron Paul supporters (not provocateurs trying to make Paul look bad). My suggestion is that whatever the truth is about that, knowing Fox and Hannity by this point, don't you think they were saving something negative to run about Paul just before this critical primary? Isn't this ever so convenient?
-----Peace & Freedom, John Clifton----
What were you watching, then? I heard quite a bit of cursing, both at Sean and in general.
As for throwing things, the video was difficult to see much at all but the audio had sounds of things breaking. Bottom line, the thugs in this video are unhinged. Were I a Paul supporter (God forbid!) I would be even more incensed at them.