Here you can find the solution: https://wpdiscuz.com/community/troubleshooting/delete-username-in-source-code/#post-22994

Sure it works fine. 

You can use the solution provided by another user in this post: 

https://wpdiscuz.com/community/postid/5755/

This applies to guests, I'm hoping to provide a feature for logged in users that do not need to put their name / email address in anyway. It would be really cool to have a button that enables them to anonymise their post - still linked to their account for moderation etc, but rendered as 'anonymous' on the frontend. 

Sure, it's possible. Just navigate to Dashboard > wpDiscuz  Forums admin page, edit the "Default Form", set the Name and Email fields not-required using the according option.

More info here: https://wpdiscuz.com/docs/wpdiscuz-7/getting-started/manage-comment-forms/comment-form-builder/#comment_form_fields

As a result, the "*" symbol will disappear, i.e. these fields will become optional.

If you want to hide those fields at all, use the CSS codes below.

For hiding the email field use this CSS code: 

.wpdiscuz-item.wc_email-wrapper.wpd-has-icon {
    display: none;
}

For hiding the name field use this CSS code: 

.wpdiscuz-item.wc_name-wrapper.wpd-has-icon {
     display: none;
}

Put the code in the Top Admin Bar > Customize > Additional CSS > "Additional CSS" textarea, save it, delete all caches and check again. 

Please don't forget to press Ctrl+F5 (twice) on the frontend before checking.

Important: Before adding the code, you should uncheck the "Field is Required" checkbox.