Ignore and move on. People post all kinds of stuff here. Some is interesting, some is not. I likewise see people showing a plethora of signs of various neurodivergences and disorders, but that doesn't change my reaction to their writing. Their writing is either interesting, and I engage with it, or it is nonsense, and I do not.

I rarely see anyone who is so off the rails that they appear to be in danger. HN as an outlet for their thoughts could even be therapeutic. So while I might not personally engage with it, I don't see that gatekeeping HN from such people or their writing would be a net good.

You should mail such concerns to site admins at hn@ycombinator.com if you feel someone is misusing the site.

> I'm unsure of what the right response to this is

I think ignoring them is the best response.

[dead]

Don't believe what you read on the internet! -Abraham Lincoln.