Index: modules/forum.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/forum.module,v
retrieving revision 1.322
diff -u -r1.322 forum.module
--- modules/forum.module	27 Mar 2006 18:02:48 -0000	1.322
+++ modules/forum.module	30 Mar 2006 23:21:51 -0000
@@ -203,6 +203,29 @@
 }
 
 /**
+ * Implementation of hook_form_alter().
+ */
+function forum_form_alter($form_id, &$form) {
+  // hide critical options from forum vocabulary
+  if ($form_id == 'taxonomy_form_vocabulary') {
+      
+    if ($form['vid']['#value'] == _forum_get_vid()) {
+      $form['help_forum_vocab'] = array(
+        '#value' => t('This is the designated forum vocabulary. Some of the normal vocabulary options have been removed.'),
+        '#weight' => -1,
+      );
+      $form['hierarchy'] = array('#type' => 'hidden', '#value' => 1);
+      unset($form['relations']);
+      unset($form['tags']);
+      unset($form['multiple']);
+      $form['required'] = array('#type' => 'hidden', '#value' => 1);
+    }
+    //hide the forum content type from everything
+    unset($form['nodes']['#options']['forum']);
+  }
+}
+
+/**
  * Implementation of hook_load().
  */
 function forum_load($node) {