I’m still extremely liberal about comments. If you engage at all, I’ll upvote. If you’re not adding value (and I have a low threshold for that), I’ll ignore you. If you attack me, I’ll still ignore you. If you’re being abusive or stupid, I’ll downvote you. I think the times I’ve reported or deleted comments on my answers in the 1.5 years I’ve been here, can be counted on a hand or two.
But I do avoid controversies (that don’t involve Quora itself). I’ve gotten away with liberality in comments, because I’ve been avoiding conflict in general; I’ve gotten just two BNBR warnings in my time here.
I will cc comments a lot to people who should know of them, through @-mention. Unfortunately, @-mention has been only sporadically functional for months. (The lightbox ads aren’t though!)