Logged in reviews look like this:
anon/unlogged in, like this:
The email field displays to YOU when you're logged in and leaving a review, but not to anyone else. It won't display in the review board if you're logged in.
On unlogged in/anon reviews, the email is displayed in the review board itself, after the user inputs it when asked. What we suggest for users who don't wish for it to be displayed, is to input the word private instead of their email address.