diff --git a/resources/sql/autopatches/20220401.phameinteract.03.sql b/resources/sql/autopatches/20220401.phameinteract.03.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20220401.phameinteract.03.sql
@@ -0,0 +1,6 @@
+ALTER TABLE {$NAMESPACE}_phame.phame_blog
+  ADD interactPolicy VARBINARY(64) NOT NULL;
+
+UPDATE {$NAMESPACE}_phame.phame_blog
+  SET interactPolicy = 'users'
+  WHERE interactPolicy = '';
diff --git a/src/applications/phame/editor/PhameBlogEditor.php b/src/applications/phame/editor/PhameBlogEditor.php
--- a/src/applications/phame/editor/PhameBlogEditor.php
+++ b/src/applications/phame/editor/PhameBlogEditor.php
@@ -21,8 +21,10 @@
 
   public function getTransactionTypes() {
     $types = parent::getTransactionTypes();
+
     $types[] = PhabricatorTransactions::TYPE_VIEW_POLICY;
     $types[] = PhabricatorTransactions::TYPE_EDIT_POLICY;
+    $types[] = PhabricatorTransactions::TYPE_INTERACT_POLICY;
 
     return $types;
   }
diff --git a/src/applications/phame/storage/PhameBlog.php b/src/applications/phame/storage/PhameBlog.php
--- a/src/applications/phame/storage/PhameBlog.php
+++ b/src/applications/phame/storage/PhameBlog.php
@@ -24,6 +24,7 @@
   protected $creatorPHID;
   protected $viewPolicy;
   protected $editPolicy;
+  protected $interactPolicy;
   protected $status;
   protected $mailKey;
   protected $profileImagePHID;
@@ -56,6 +57,7 @@
 
         'editPolicy' => 'policy',
         'viewPolicy' => 'policy',
+        'interactPolicy' => 'policy',
       ),
       self::CONFIG_KEY_SCHEMA => array(
         'key_phid' => null,
@@ -88,7 +90,9 @@
       ->setCreatorPHID($actor->getPHID())
       ->setStatus(self::STATUS_ACTIVE)
       ->setViewPolicy(PhabricatorPolicies::getMostOpenPolicy())
-      ->setEditPolicy(PhabricatorPolicies::POLICY_USER);
+      ->setEditPolicy(PhabricatorPolicies::POLICY_USER)
+      ->setInteractPolicy(PhabricatorPolicies::POLICY_USER);
+
     return $blog;
   }
 
@@ -229,6 +233,7 @@
   public function getCapabilities() {
     return array(
       PhabricatorPolicyCapability::CAN_VIEW,
+      PhabricatorPolicyCapability::CAN_INTERACT,
       PhabricatorPolicyCapability::CAN_EDIT,
     );
   }
@@ -238,6 +243,8 @@
     switch ($capability) {
       case PhabricatorPolicyCapability::CAN_VIEW:
         return $this->getViewPolicy();
+      case PhabricatorPolicyCapability::CAN_INTERACT:
+        return $this->getInteractPolicy();
       case PhabricatorPolicyCapability::CAN_EDIT:
         return $this->getEditPolicy();
     }
diff --git a/src/applications/policy/editor/PhabricatorPolicyEditEngineExtension.php b/src/applications/policy/editor/PhabricatorPolicyEditEngineExtension.php
--- a/src/applications/policy/editor/PhabricatorPolicyEditEngineExtension.php
+++ b/src/applications/policy/editor/PhabricatorPolicyEditEngineExtension.php
@@ -66,6 +66,16 @@
         'description.conduit' => pht('Change the join policy of the object.'),
         'edit' => 'join',
       ),
+      PhabricatorTransactions::TYPE_INTERACT_POLICY => array(
+        'key' => 'policy.interact',
+        'aliases' => array('interact'),
+        'capability' => PhabricatorPolicyCapability::CAN_INTERACT,
+        'label' => pht('Interact Policy'),
+        'description' => pht('Controls who can interact with the object.'),
+        'description.conduit'
+          => pht('Change the interaction policy of the object.'),
+        'edit' => 'interact',
+      ),
     );
 
     if ($object instanceof PhabricatorPolicyCodexInterface) {
diff --git a/src/applications/transactions/constants/PhabricatorTransactions.php b/src/applications/transactions/constants/PhabricatorTransactions.php
--- a/src/applications/transactions/constants/PhabricatorTransactions.php
+++ b/src/applications/transactions/constants/PhabricatorTransactions.php
@@ -7,6 +7,7 @@
   const TYPE_VIEW_POLICY  = 'core:view-policy';
   const TYPE_EDIT_POLICY  = 'core:edit-policy';
   const TYPE_JOIN_POLICY  = 'core:join-policy';
+  const TYPE_INTERACT_POLICY = 'core:interact-policy';
   const TYPE_EDGE         = 'core:edge';
   const TYPE_CUSTOMFIELD  = 'core:customfield';
   const TYPE_TOKEN        = 'token:give';
diff --git a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
--- a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
+++ b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
@@ -428,6 +428,11 @@
           return null;
         }
         return $object->getJoinPolicy();
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
+        if ($this->getIsNewObject()) {
+          return null;
+        }
+        return $object->getInteractPolicy();
       case PhabricatorTransactions::TYPE_SPACE:
         if ($this->getIsNewObject()) {
           return null;
@@ -502,6 +507,7 @@
       case PhabricatorTransactions::TYPE_VIEW_POLICY:
       case PhabricatorTransactions::TYPE_EDIT_POLICY:
       case PhabricatorTransactions::TYPE_JOIN_POLICY:
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
       case PhabricatorTransactions::TYPE_TOKEN:
       case PhabricatorTransactions::TYPE_INLINESTATE:
       case PhabricatorTransactions::TYPE_SUBTYPE:
@@ -658,6 +664,7 @@
       case PhabricatorTransactions::TYPE_VIEW_POLICY:
       case PhabricatorTransactions::TYPE_EDIT_POLICY:
       case PhabricatorTransactions::TYPE_JOIN_POLICY:
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
       case PhabricatorTransactions::TYPE_SUBSCRIBERS:
       case PhabricatorTransactions::TYPE_INLINESTATE:
       case PhabricatorTransactions::TYPE_EDGE:
@@ -722,6 +729,7 @@
       case PhabricatorTransactions::TYPE_VIEW_POLICY:
       case PhabricatorTransactions::TYPE_EDIT_POLICY:
       case PhabricatorTransactions::TYPE_JOIN_POLICY:
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
       case PhabricatorTransactions::TYPE_INLINESTATE:
       case PhabricatorTransactions::TYPE_SPACE:
       case PhabricatorTransactions::TYPE_COMMENT:
@@ -776,6 +784,9 @@
       case PhabricatorTransactions::TYPE_JOIN_POLICY:
         $object->setJoinPolicy($xaction->getNewValue());
         break;
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
+        $object->setInteractPolicy($xaction->getNewValue());
+        break;
       case PhabricatorTransactions::TYPE_SPACE:
         $object->setSpacePHID($xaction->getNewValue());
         break;
diff --git a/src/applications/transactions/storage/PhabricatorApplicationTransaction.php b/src/applications/transactions/storage/PhabricatorApplicationTransaction.php
--- a/src/applications/transactions/storage/PhabricatorApplicationTransaction.php
+++ b/src/applications/transactions/storage/PhabricatorApplicationTransaction.php
@@ -350,6 +350,7 @@
       case PhabricatorTransactions::TYPE_EDIT_POLICY:
       case PhabricatorTransactions::TYPE_VIEW_POLICY:
       case PhabricatorTransactions::TYPE_JOIN_POLICY:
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
         if (!PhabricatorPolicyQuery::isSpecialPolicy($old)) {
           $phids[] = array($old);
         }
@@ -479,6 +480,7 @@
       case PhabricatorTransactions::TYPE_VIEW_POLICY:
       case PhabricatorTransactions::TYPE_EDIT_POLICY:
       case PhabricatorTransactions::TYPE_JOIN_POLICY:
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
         return 'fa-lock';
       case PhabricatorTransactions::TYPE_EDGE:
         switch ($this->getMetadataValue('edge:type')) {
@@ -590,6 +592,7 @@
         case PhabricatorTransactions::TYPE_VIEW_POLICY:
         case PhabricatorTransactions::TYPE_EDIT_POLICY:
         case PhabricatorTransactions::TYPE_JOIN_POLICY:
+        case PhabricatorTransactions::TYPE_INTERACT_POLICY:
         case PhabricatorTransactions::TYPE_SPACE:
           break;
         case PhabricatorTransactions::TYPE_SUBTYPE:
@@ -634,6 +637,7 @@
       case PhabricatorTransactions::TYPE_VIEW_POLICY:
       case PhabricatorTransactions::TYPE_EDIT_POLICY:
       case PhabricatorTransactions::TYPE_JOIN_POLICY:
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
       case PhabricatorTransactions::TYPE_SPACE:
         if ($this->getIsCreateTransaction()) {
           break;
@@ -887,6 +891,10 @@
         return pht(
           'This %s already has that join policy.',
           $this->getApplicationObjectTypeName());
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
+        return pht(
+          'This %s already has that interact policy.',
+          $this->getApplicationObjectTypeName());
       case PhabricatorTransactions::TYPE_SUBSCRIBERS:
         return pht(
           'All users are already subscribed to this %s.',
@@ -964,6 +972,19 @@
             $this->renderPolicyName($old, 'old'),
             $this->renderPolicyName($new, 'new'));
         }
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
+        if ($this->getIsCreateTransaction()) {
+          return pht(
+            '%s created this object with interact policy "%s".',
+            $this->renderHandleLink($author_phid),
+            $this->renderPolicyName($new, 'new'));
+        } else {
+          return pht(
+            '%s changed the interact policy from "%s" to "%s".',
+            $this->renderHandleLink($author_phid),
+            $this->renderPolicyName($old, 'old'),
+            $this->renderPolicyName($new, 'new'));
+        }
       case PhabricatorTransactions::TYPE_SPACE:
         if ($this->getIsCreateTransaction()) {
           return pht(
@@ -1204,6 +1225,11 @@
           '%s changed the join policy for %s.',
           $this->renderHandleLink($author_phid),
           $this->renderHandleLink($object_phid));
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
+        return pht(
+          '%s changed the interact policy for %s.',
+          $this->renderHandleLink($author_phid),
+          $this->renderHandleLink($object_phid));
       case PhabricatorTransactions::TYPE_SUBSCRIBERS:
         return pht(
           '%s updated subscribers of %s.',
@@ -1426,6 +1452,7 @@
       case PhabricatorTransactions::TYPE_VIEW_POLICY:
       case PhabricatorTransactions::TYPE_EDIT_POLICY:
       case PhabricatorTransactions::TYPE_JOIN_POLICY:
+      case PhabricatorTransactions::TYPE_INTERACT_POLICY:
         return pht('Changed Policy');
       case PhabricatorTransactions::TYPE_SUBSCRIBERS:
         return pht('Changed Subscribers');