I had a little side project I was working on a while ago that would ingest "Who's Hiring" posts every month through the HN API and analyze month to month when each one came and went, in order to call out the companies posting the (according to some heuristic) same ad for months and months, never actually hiring anyone. I was going to snarkily call the tool "Who's Not Hiring?"

Obviously a company -actually- hiring the same kind of person month after month would be a false positive, but I thought it might help to catch some of these companies abusing "Who's Hiring"