Am I going to be receiving emails from a moderator as a follow up for a report I made?
No, you are not. There is no mentioned that you will receive an email from them, isn't it?
I think the report system should be simple and if possible automated in order not to discourage anyone from reporting obvious spams. What's the essence of revealing my email?
All report system required the reporter to know who are they, it's simple. The current report system never discourage users to report, there are already ten of thousands reports came from a single user, and thousands from others.