One tool HN provides is the ability to view a user's other comments, which can provide a gauge to measure whether someone is engaging in good faith.
And there's always the choice to not respond. If you think someone is just looking for attention, not responding might be the right course of action. Once people get angry or frustrated, it's probably better to just back off and try again some other time. And in general I'm thinking of myself as well to those I'm engaging with.
Or if you don't think you have something meaningful to add. Sometimes that's hard to do because you think the conversation is important and want to participate.
Please don't interpret anything I've written as criticism of either you or tptacek. For the record, from what I've seen both of you are thoughtful and engaging honestly. I also hope this doesn't come off as preachy. These are just the heuristics I've been using. Some others are Rapoport's rules [0], which I think are really insightful. I'd love to hear how others approach this as well.
I've thought about all these things in writing this comment, and I'm still unsure whether I should click the "reply" button. I do think it's important to try to keep these types of conversations going, and I know I need the practice, so in good faith I'm willing to put my neck out another time.
[0] https://www.brainpickings.org/2014/03/28/daniel-dennett-rapo...