I think it's fair enough to say, "I disagree with Sir/Lady So-And-So's blog comments, and here's why..."
I do not think it fair, fine or ethical to use one's own blog as a place to malign the character or motives of other writers, and especially not to play Junior Psychologist and make lofty suggestions as to the condition of various people's unconscious selves. No, I'm not including a link. This isn't dish, it's a sincere concern. We are a reconciling people.
We must guard against ridiculous asswhappery. No one knows another person's unconscious self except God. Or maybe their shrink. At any rate, there's plenty to talk about without fantasizing that we have any understanding at all of the other crazed bloggers out there.
That's one of the reasons I have consistently declined to be included on the official list of Unitarian Universalist bloggers, although I have wound up on many such lists anyway: we're a little family and it's too easy to get drawn into the habit of talking about and psuedo-analyzing each other, instead of being inspired by each other.
(If you haven't read UU blogs, there's a derned good list of them at www.philocrites.com. Better yet you should get up on Sunday morning and visit one of our congregations. Keep going back. Go back six times before you make up your mind.)
In blogging, as in all other literary pursuits, "write what you know, not what you don't know."
I'm not a former English teacher for nothin'.
(I recommended to my church that they stay up at least one night this summer to see the sun rise. Tonight's gonna be my night. I have a full-out insomniac situation going on here.)