Just the one? If only.
Every time there is a story on HN that is even tangentially related to either HIV or LGBTQ+ sexual health, it inevitably devolves into a morass of misinformation and thinly-veiled homophobia. There are different degrees of it - some is presented in a more "civil" veneer, which helps it stay upvoted, but at its core, it's all coming from the same place.
Public health professionals who specialize in HIV and LGBTQ+ sexual health are actually pretty unanimous in their position on this topic, but somehow that never sways these folks (which should be a pretty good sign that they're not arguing in good faith).
In this case I think the relevant position is widely known. Supporting people to have safe sex works, whereas shaming them for having more than some vaguely specified maximum number of acceptable sexual partners does not work.
This is a statement of fact, please stop mistaking it as a moral judgement that we need to fight against. You cannot help mitigate or solve a problem without accepting reality.
It's much more important to have safe sex. Condoms and PrEP work.
Every thread on HN about HIV/AIDS seems to attract at least one person who feels obliged to say something about how promiscuous gay people are. I don't think these comments often come from a good place. (For example, you have previously made a rather insensitive joke about 'pozzing' on this site.)