I get about one of these a week.
Most of the recent ones are just AI slop that go straight to the bin. Some are real. Sometimes we will actually schedule a meeting that never occurs.
I suspect what happens in the latter case is someone finds a comment they super agree with but then has enough downtime to review everything I've posted over the last 9 years. Eventually, they run into something they don't like and turn into a ghost.
The HN community is really fucking aggressive with their ideologies. The asymmetry is sad. I am willing to endure a lot of neckbeard shit about OSS and owning everything in the stack. The reciprocal does not exist at all. The moment I express even a mild preference for a "forbidden" idea like using Microsoft's technologies, straight to jail. I feel like I'd probably be more relaxed at a 4chan meetup than a HN meetup.