An irrelevant observation?

Occasionally it becomes a strong suspicion regarding some members who join, that they have no real questions but have made up their minds, and only pose questions to cause mischief where they can. They may even include emotive elements as bait. They reject anything that does not agree with their hypothesis, even logical explanations, and just pull out something, a sentence or a phrase that side-skirts all that has been explained, ignoring all else that does not supports their hypothesis.

Those who do so, know that this is their purpose. If I suspect it is the case I generally prefer not to engage. Is this appropriate, I wonder!