I'm amused by Massad Ayoob's suggestion.
Many more observers, looking at the frigid weather in the Ferguson/St. Louis area – which many of us “in the business” believe may be a factor in the announcement being delayed this long – are of the opinion that fire hoses could come into play if extreme mob violence has to be contained.
I’m not recommending fire hoses, mind you, but given that the police in Ferguson have been shot at repeatedly since this whole thing began, and to the best of my knowledge the cops haven’t thrown anything but gas and rubber back, if things go violent a Night of the Frozen Ice Protesters might be preferable to another Kent State.
There's more at the link.
I'm particularly amused because the use of fire hoses by police doesn't appear to violate the 19 'rules of engagement' that protest leaders have asked the authorities to accept (with only limited success). Apparently the organizers hadn't anticipated that during the current cold snap, their special snowflake