Man, I don't know if it's against site guidelines, but I've never liked using people's bios - even if public on HN - as ammunition against their comments. Isn't it better to just respond to the content of the comments themselves?
When disagreeing, please reply to the argument instead of calling names. "That is idiotic; 1 + 1 is 2, not 3" can be shortened to "1 + 1 is 2, not 3."
Although it depends on how it is phrased of course.
I'm inclined to agree, but in the case of outright hypocrisy I think the point deserves to be made, because hypocrisy is literally the worst