"3. Agents provocateurs.
That's why they wear bandanas."
They offer that excuse with no proof literally every time one of their protests gets violent.
Oakland has long been known as a haven for ultra- radical "Black Bloc" leftists with no problem resorting to crime and violence in their actions. Occupy Oakland was easily one of the most violent and lawless of the major Occupy groups, and its feminist spinoff Occupy Oakland Partriarchy gained attention last summer for protesting AGAINST a conference designed around fighting against child sex trafficking. It doesn't surprise me in the least that the anti- Zimmerman protest in Oakland was the first or at least one of the first to get violent.
As for why they wear bandanas (Or occasionally ridiculous Guy Fawkes masks), 3 reasons:
1. First and foremost, to make it harder for police to identify and arrest them when they carry out their actions (Agents provocateurs would not do this, as they know they have nothing to fear from getting caught by the cops).
2. To lessen the risk of their rich parents seeing them in news footage of the riots, I mean protests, recognizing them, and cutting off their trust funds.
3. To cover up the fact that most Black Bloc Anarchists have hideously rotted teeth, as a result of all the crystal meth they take.