What I can tell you as someone who has spent altogether too much time on HN is that for the most part, the people writing the worst comments on these threads are drive-by anonymous trolls, and not serious members of the community. Further, people who have a serious HN presence who contribute to the muck on these threads are, as you can see from the grey cast their comments take, driving themselves into pariah status. You'll notice that even when a creepy comment is written by someone with a lot of karma... they're gonna tend not to have their real names on their profile.
There's probably not a whole lot HN can do in the near term to keep hostile, offensive noise off threads like these. Anyone can make an account, and some people keep a whole battery of sockpuppet accounts handy so they can stir shit up on the threads. All I can tell you is that if you feel like you need to stand up for yourself on a thread like this, there are lots of long-time serious people on HN who will have your back. If you don't want to do that, nobody can blame you.
Welcome to HN, by the way. Stick around.