You can set up KBPublisher so that user comments appear immediately, or so that they must be approved first, or you can turn comment functionality off altogether. You may also identify whether or not only registered users can add comments.

• From the Settings menu choose the Public Area -> Articles tab
• Go to the Comments section
• Specify who can add comments via allow add comments
• Specify whether the comments must approved before they appear via the comment approval policy
• Specify whether a user must type in a visual confirmation code before they can send the comment via enable visual confirmation to add comment
• Click Save.

You must have administrator access to change the settings.