SEATTLE - Modern hunters rarely become more famous than Jim Zumbo. A mustachioed, barrel-chested outdoors entrepreneur who lives in a log cabin near Yellowstone National Park, he has spent much of his life writing for prominent outdoors magazines, delivering lectures across the country and starring in cable TV shows about big-game hunting in the West. Zumbo's fame, however, has turned to black-bordered infamy within America's gun culture -- and his multimedia success has come undone. It all happened in the past week, after he publicly criticized the use of military-style assault rifles by hunters, especially those gunning for prairie dogs.