Transgression as critique
Every taboo exists because something uncomfortable would become visible without it. The transgressive writer's first move is to identify what a given prohibition conceals and to ask whether exposing it serves a critical purpose. Violating the taboo is the method; the revelation beneath it is the goal. Bret Easton Ellis's graphic violence in American Psycho is inseparable from his critique of consumer capitalism and masculine narcissism — remove the transgression and you remove the argument. The most effective transgressive fiction chooses its violations precisely, because the specific taboo broken determines what specific truth becomes visible. Transgression without a target is mere noise.