Hacker News Reader

It's not a solution, but you can change your username to something random by contacting dang.

Reddit lets you make the choice on the spot and leaves the content with the user name marked as [deleted].

Although I'm sure this community is small and the great team here is responsive enough.

You can remove content on Reddit too.

HN is (intentionally?) a very manual and obscure operation.

I've contacted in the past for another account to delete a singular comment and was ignored :/

The mail may have been overlooked. I typically see a response within a day, often in minutes. Though not always.

AFAIU dang and sctb alone manage all email requests from all HN accounts, which is a fairly sizeable community.