They're called riot control agents.
Not unlawful assembly control agents. Not dispersal aids.
I think we should think about that, and remember that.
We have learned that anarchists are expert at organizing chaos, volatility and mistrust. Most of them probably got away with enveloping everybody else in their noxious three-day game of chicken. My interest is in doing better next time, not blaming anybody for this decision or that stratagem. I blame the anarchists for the whole thing. But we will learn from this. Everything was not "fine" in Oakland.