I dont think you’ll see organized riots unless Sharpton/Jackson get busy really fast.
I think we will see isolated cases of ‘revenge’ on white people.
I can only relate from personal experience, on a recent outing that brought me into contact with a group of black middle school children. Within the group was one young girl who kept glaring at me with an intensely deep and abiding visceral hatred. She made no attempt to hide or disguise it. "If looks could kill."
I had walked the streets of every war torn African nation. Looked into the eyes of heavily armed child soldiers, and shook hands with the Devil himself, but never before saw what I saw in that girl's eyes. Someone had thoroughly indoctrinated, brainwashed her into seeing me as the enemy, and nothing would ever change that. Nothing. I had no doubt that in a "justice for Trayvonne" scenario, she'd be most likely to slip up quietly from behind in a crowd situation, and put a knife in my back.
I suspect Sharpton/Jackson know they’re on the wrong side in this and we won’t hear a peep out of either of them. Tuck tails and hide. I doubt there will be any rioting.
If either side needs to sue, it’s Zimmerman.