I guess I would have to say that this would depend on the motivation of the poster in question, which might or might not be a known quantity. If this hypothetical poster genuinely wanted to participate in and contribute to the community, then I would in theory support engaging in some sort of dialogue before booting them permanently. On the other hand, constantly feeding trolls who come here solely to disrupt would be counterproductive and reduce FR to little more than Usenet with a good front end.
If memory serves, there used to be a FR feature called "The Alley" - an anteroom of sorts where personal disagreements could be worked out. Wouldn't such a place, out of the flow of normal posts, be an ideal venue for resolution of disagreements like this?
Absolutely.
I think that was L.com.