There's a troll inside each of us, ready to make bad-faith arguments for various reasons. Repeatedly engaging and calling out bad-faith posts (which itself is subjective) is not productive and only helps amplify the noise, especially if it's an ad-hominem callout. If someone was making a genuinely bad-faith argument it's not like calling them out is going to make them retract it. Western culture has taught us to dig our feet in when attacked, whether we were right or not. So all that's going to happen is a rapidly escalating back-and-forth between 2-3 posters while the rest of the audience looks on in despair.
Of course the first-order self-control is to avoid making a post in bad faith to begin with. But it's going to happen, and we can collectively limit the damage. Take the high road. Respond once with a good-faith rebuttal to the *content* of the post, and then move on. The noise will die away.