MINNEAPOLIS - Shrouded in black, with a bandanna masking her face, a self-proclaimed anarchist slips into her combat boots and dashes through town, tossing a Molotov cocktail here, launching a bowling ball there. The YouTube video is more parody than threat: The flaming cocktail ignites a charcoal grill, and the bowling ball knocks down pins instead of crashing through a Navy recruiting office window. But as the video fades to black, the message on-screen is clear: "We're getting ready. What are you doing?" With less than 10 months to go before the Republican National Convention in Minneapolis-St.Paul, activists are already...