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If getting a little egg on your noggin for being a dumbass is "brutalizing" then the line of plaintiffs would be miles and miles long.
No one wants to see the guy dragged on the ground and beaten, but I still am OK with a little bump in return for swinging bikes stands at the officers. To take it to the extreme, if they felt that the combination of the suspect swinging the bike stand and the crowd acting hostilely toward them put their lives in danger, they might have had just cause to draw their weapons.