How do I ban another Pandora user from leaving comments?
If you want to go further and prevent a specific listener from leaving any comments in future, click the “ban” button in the upper right corner of any comment by that user. All comments by that user are deleted at once. [Note: for this purpose, do not use the delete button, as deleting the comment will also remove the button which will allow you to “ban” that user.] — For information on how to remove the comment feature from your Profile Page entirely, see above: http://blog.pandora.
How do I ban another Pandora user from leaving comments?