WTO protests: That was all over the MSM - that is assuming you consider the NYT, CNN, and even FOX to be MSM.
Violence on either side is just wrong, but if we are going down this path then I posit that when there is such violence it tends to come far more from those espousing extreme conservative views than extreme liberal ones. I mean no one has ever shot a doctor who chose not to perform abortions. Unabomber is the one real exception I can think of.