Thanks for listening to feedback :)
It is a painful process for both the seekers (who feel they are being ghosted) and the employers (who feel they are being spammed by AI bots); IMO the best approach is to follow the general HN guidance of "be kind" and "assume good intentions". And if a company ghosted you, downvote their post. My 2c.
I suspect they wouldn't. I suspect companies that ghost and post fake jobs wouldn't even reply. And companies that have real job posts would reply and have a chance to convince the job is real.
People already have to scroll a ton of job posts that are not for them (due to stack, location, seniority, whatever) and the [-] button is pretty efficient in hiding long discussions.
The [-] button is a pretty good solution for long discussions in a job post.
Let seekers share their experience is a pretty useful signal, even if there is no way to know if the seeker is telling the truth. But downvotes are even more secretive and are allowed.