Anonymous User Reviews Add-on for WP Rich Snippets Plugin
Sometimes we need to allow users to be anonymous. The Anonymous add-on will allow you to accept anonymous user reviews on your website, it will make the name and email field completely optional so that Reviewers can submit a review without having to provide their Name or Email address and stay anonymous.
If at some point you needed to totally remove the Name and Email fields, no problem! TheAnonymous add-on will allow you to hide Name and Email fields completely from the form.