To hide the email address of people who submitted comments in your Interspire Knowledge Manager installation, edit the includes/classes/class.questions.php file and find the line
$author = $GLOBALS['AKB_CLASS_HELPER']->PrepareCommentAuthor($row['name'], $row['email']);
All you need to do is to change this line to
$author = $GLOBALS['AKB_CLASS_HELPER']->PrepareCommentAuthor($row['name'], '');
And only their name will show up in the publicly visible area.

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