I am not at that level of paranoia yet, but I do rotate my accounts once a year to avoid accumulating too much information under one username. This is usually enough to prevent stylometric analysis. So I just need to worry about people with access to HN database/logs/moderation tools, assuming HN itself never gets compromised.

I guess I just want some reassurance that the tracking is being done responsibly and is considered privileged information only used as needed to keep the site working (moderating is pretty fair) and nothing else. Bonus points if the session logs aren't kept forever (something something GDPR compliance?).