The guy looks at you askance, and lowers the gun. "You know what?" he says with a grim smile, "I'm not gonna kill you. I'm gonna do something much worse to a metalhead like you. I'm gonna grind up all your metal albums, every one." Seeing the shock in your eyes, he relents a little. "Okay, okay! Jeez! Don't blubber!" he snarls in disgust. "You can keep the discographies of three bands or artists only, but the rest go into the grinder."
You have seconds to choose: who and why?