I do want to remove my account there.

But when I was doing it, I got a big warning that anyone could come up and register that handle for themselves. So I instead ended up just deleting every post, my personal details, and left the account alone (not using it anymore).

I know they do this intentionally (it's bad intentions all over the place on social networks nowadays, except HN, of course).

I'm terrified of somebody else just creating the account with the same handle I used to have, and impersonate me across old friends and contacts.

What do you suggest?