Why not? It may happen to be curious. And every kind of DIY bio-hacking community site may happen to contain some potentially useful data. Surely it has serious chances to be dangerous but I believe the audience of HN is smart enough to separate curious from stupid, double-check the curious with relevant scientific publication and other sources and be reasonably skeptic and sufficiently careful about trying it on themselves. So... surely stuff like this should not be mentioned among kids but I can see nothing wrong in mentioning them among hackers.
I've never heard of it. What makes it so bad?
Edit: Ah, it seems to be people transitioning but doing so without the aid of a doctor. I mean, you shouldn't do it for obvious safety reasons but if you've decided you're doing it, a community of like-minded people is marginally better than nothing, at least you can learn some things that definitely don't work.
> Ah, it seems to be people transitioning but doing so without the aid of a doctor.
No. The number one piece of advice on the site is to see a GP and endo for monthy blood testing of certain specific markers to ensure that everything is fine.
The reason the community exists is because for many people the local (and usually arbitrary) rules put on transitioning are ridiculous, and even after fulfilling those points the health service makes them wait typically over three years for hormone replacement therapy. Given that HRT is a critical aspect of treatment, and almost completely safe, for many people on /r/transDIY it's a hopeful alternative to ending it early.