Based on my experience with end users I wouldn't call his behavior moronic. I would say it's about average. We regularly have people who go into their accounts

Based on my experience with end users I wouldn't call his behavior moronic. I would say it's about average. We regularly have people who go into their accounts and change dns without realizing what that means. They only know that either the web "guy" or the new host told them to do that. Or they read they should do that in the setup instructions. They may not have purchased email service at the new host and they think that everything will just work. Many times if they speak to 1st level tech support at the new host they don't know enough to even know what will or will not happen with a dns server change.