It's not really an issue, but I'm just curious as to why this is. Is it a feature of SMF that can't be disabled? Or is it there for an actual reason?
Only the specific board moderator(s) can see your email when you report a post.
For example if you report a post in the Greek board (in which I'm the board moderator), I receive an email from the forum saying that you reported a post, and that's when I can see your email (in my mailbox, not in the forum)
Also, if you report a post made by a newbie, your email is not known to all the patrollers, but as I said only to the board moderator (if there is one)