Occupy is an anarchist movement with or without the violence. I do not see how inviting a crackdown is going to help Occupy as a political movement: when it comes to violence, Occupy is not a patch on the government, or even private security forces. Occupy's great strength lies in its widespread popular support, and in the real grievances it gives voice to. If it turns into a factionalized violent movement, it will lose that support and much of its power.
[Later thought: violence is inherently authoritarian. Can anarchism ever be violent?]
