Only certain mods can see it - I can't for instance - but I agree that if it doesn't need to be there then it should be removed.
You can't see the mail ids even when a report is made in a board you moderate? I got the impression it was otherwise from the post below
Only the specific board moderator(s) can see your email when you report a post.
As Muhammad said. I randomly only started getting them after the forum went down though. Had to change my email because I was getting spammed by them day and night. Hopefully in the new forum it won't require emails to be shown or I hope we can turn them off at least.