News: L.A. Police and sidewalk chalk clash

L.A. Times:
LAPD officers, Occupy L.A. protesters clash during ArtWalk downtown
Occupy L.A.'s chalk protests prompt melee, free-speech debate
Violent arrests, less lethal rounds, and teargas, in response to sidewalk chalk!

Good thing the L.A. police weren't around when my younger sisters did the following to the house when we were little: