Social Workers' Party goons (yes, America, we have REAL socialists over here) anarchist louts and over-excited students is the word on the grapevine. Such a shame - vast majority of students protesting (which included a big Lib Dem presence, by the by) were peaceful and whole event will now be tarred with same brush.
Interesting thought experiment - imagine if, in America, a bunch of socialists went on the rampage at Republican party headquarters, fighting police, smashing windows, etc. Wonder what the bodycount would be there? Much higher than a few injured on either side, I'm guessing...