Except these posts seem to regularly get taken down or flagged. This isn't even on the front page anymore it seems.
Edit: Also, posts without URLs get a downweight by default. I've turned that off too, and merged the other threads into this one, since it was the first one.
An NLP/Machine learning model would be a great way! Probably also taking in other features as input such as the number of comments per second, and how deeply nested those comments are.
Let's build one!
Why? There do not appear to have been any posts remotely resembling a flamewar in the comments.