In this video from the kettling of Occupy San Francisco protesters, SFPD sergeant Peter Thoshinsky (helmet #2197) is recorded walking the police line, ordering his officers, "If they do not do what you tell them, strike them."
The protesters who record this are understandably upset and try to engage the officers in a dialog about whether such an order is legal and should be followed. There's a certain amount of violating Godwin's Law here, which is understandable, even if it might not be the best way to win the day.
"If they do not do what you tell them, strike them." says SFPD while kettling OccupySF 2011-12-07
December 13, 2011
SFPD sergeant orders officers: "If [Occupy protesters] do not do what you tell them, strike them."