Flutterby™! :

From Bird on a wire , more on Seattle: black clad outsiders inciting violence at WTO protests , from the New York Times . And a Post-Intelligencer article about the agitators , and points out that they're a small fraction of those who've gathered:

The self-proclaimed anarchists appeared to be mostly teenagers and twentysomethings who donned black ski masks and black clothes sporting the anarchist symbol of the letter "A" in a circle.