So I would answer your question a little differently than perhaps what you were thinking.What happens when the scapegoat goes NC, is that if they do the work on themselves in T, they live a happy and fulfilling life, and they stop thinking about what the crazy people are doing.
My parents individually complain loudly about one another, but would present a lovey-dovey front to extended family and friends. Already as a child, I realized that my parents deflected their anger at each other and so vented at me, a well-behaved, obedient, and task-burdened child, to avoid arguing with on another. I was the target for their stress relief.When I moved cross-country for several years, they'd each call me individually to complain long and bitterly about the other. My father would even say, "you need to be here; I can't handle her", and mutter about divorce. Now that I've been NC for more than a year, my hoovering father still complains about my mother, and how I "owe him" because I'm "emotionally strong enough to endure" her mistreatment and malevolence. There it was again, in all its ugly truth: my father was quite happy to sacrifice me for "peace in the family", and my mother's quite happy to ignore my existence altogether.Think how satisfying it is to no longer be the emotional sponge for all that malevolence and ill will. Let them project their anger upon each other, where it belongs, let them soak in their own rancor, where it resides. You and I are free, free at last.