Got a number of those e-mails a few months ago and ignored.
by G.K.Chesterton (2019-01-22 14:00:34)

In reply to: Has anybody here received an email demanding ransom or they  posted by Jeash


However, it did associate the original e-mail address I used to create the NDN account with this password (a very simple one), so after seeing your e-mail, I am wondering if ND Nation got hacked at all. I can't say for sure I didn't use that e-mail address/password elsewhere.