Interesting! IANAL, but I think this should be basic functionality, ever since the recent-ish European and Californian privacy regulations. Although I think a quick e-mail to [email protected] would suffice.

Would it really? Asking cause genuinely curious, literally the only online forum I can't remove my past public information from is HN.

Even if you delete your account, it wouldn't really matter that much. Whole HN is probably crawled and archived on a daily basis due to a simplistic API