Materialists who feel backed into a corner and have no jargon to fall back on usually resort to verbal intimidation. It's a fear response. There are lots of those over on the God board. I used to take them on as well, because taking their comments at face value forced me to dig in and clarify my own position (and it helped keep the rhetorical rapier sharp).
On the other hand, if there's no dialogue it's just two egos thumb-wrestling. It's too easy for me to get attached to the dopamine rush of the joust, and there is little value in it beyond being able to watch myself in that situation. There are more pleasant and useful ways to step into the Witness - like meditating or riding the bus. Learning to decline an internet argument is great mindfulness training. 
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