I don't know him and there are 1000+ accounts affected. I notified Netflix - I even have all the other credentials. I passed them all emails + passwords and told them to email all the affected customers. This was 5 hours ago, and I'm yet to receive an email. I will email these people myself within 48 hours if Netflix hasn't done so themselves.
I'd wait before emailing everyone. You've done the right thing approaching Netflix. Much like banks, I'm sure they will not want the publicity so hopefully they will work with you and the affected accounts. I'm hoping that the passwords are not in plain text though?