Police, Occupy protesters clash in Oakland - Yahoo! News

"Glass covered streets and sidewalks from windows of area businesses that were shattered.
Graffiti on the wall next to one of the damaged shops read, "This act of vandalism was not authorized by the general assembly. Peaceful protest."

Was the graffiti not authorized or the breaking of windows not authorized?
Is any vandalism authorized or only the vandalism that the general assembly desires?

This is lunacy.