diff --git a/admin/src/app/moderation/page.tsx b/admin/src/app/moderation/page.tsx
index c262125..6e06c7c 100644
--- a/admin/src/app/moderation/page.tsx
+++ b/admin/src/app/moderation/page.tsx
@@ -28,6 +28,16 @@ export default function ModerationPage() {
   const [statusFilter, setStatusFilter] = useState('pending');
   const [reviewingId, setReviewingId] = useState<string | null>(null);
   const [reason, setReason] = useState('');
+  const [customReason, setCustomReason] = useState(false);
+
+  const banReasons = [
+    'Hate speech or slurs',
+    'Harassment or bullying',
+    'Spam or scam activity',
+    'Posting illegal content',
+    'Repeated violations after warnings',
+    'Ban evasion (alt account)',
+  ];
   const [selected, setSelected] = useState<Set<string>>(new Set());
   const [bulkLoading, setBulkLoading] = useState(false);
 
@@ -198,9 +208,36 @@ export default function ModerationPage() {
               {reviewingId === item.id && (
                 <div className="mt-4 p-4 bg-red-50 border border-red-200 rounded-lg">
                   <p className="text-sm font-medium text-red-800 mb-2">Ban user and remove content</p>
-                  <input className="input mb-2" placeholder="Reason for ban..." value={reason} onChange={(e) => setReason(e.target.value)} />
+                  <div className="space-y-1.5 mb-3">
+                    {banReasons.map((preset) => (
+                      <button
+                        key={preset}
+                        onClick={() => { setReason(preset); setCustomReason(false); }}
+                        className={`w-full text-left px-3 py-1.5 rounded text-xs border transition-colors ${
+                          reason === preset && !customReason
+                            ? 'border-red-400 bg-red-100 text-red-800 font-medium'
+                            : 'border-red-200 hover:border-red-300 text-red-700'
+                        }`}
+                      >
+                        {preset}
+                      </button>
+                    ))}
+                    <button
+                      onClick={() => { setCustomReason(true); setReason(''); }}
+                      className={`w-full text-left px-3 py-1.5 rounded text-xs border transition-colors ${
+                        customReason
+                          ? 'border-red-400 bg-red-100 text-red-800 font-medium'
+                          : 'border-red-200 hover:border-red-300 text-red-700'
+                      }`}
+                    >
+                      Custom reason...
+                    </button>
+                  </div>
+                  {customReason && (
+                    <input className="input mb-2 text-sm" placeholder="Enter custom reason..." value={reason} onChange={(e) => setReason(e.target.value)} autoFocus />
+                  )}
                   <div className="flex gap-2">
-                    <button onClick={() => { setReviewingId(null); setReason(''); }} className="btn-secondary text-xs">Cancel</button>
+                    <button onClick={() => { setReviewingId(null); setReason(''); setCustomReason(false); }} className="btn-secondary text-xs">Cancel</button>
                     <button onClick={() => handleReview(item.id, 'ban_user')} className="btn-danger text-xs" disabled={!reason.trim()}>Confirm Ban</button>
                   </div>
                 </div>
diff --git a/admin/src/app/users/[id]/page.tsx b/admin/src/app/users/[id]/page.tsx
index 80c339e..be1bcd0 100644
--- a/admin/src/app/users/[id]/page.tsx
+++ b/admin/src/app/users/[id]/page.tsx
@@ -16,6 +16,32 @@ export default function UserDetailPage() {
   const [actionLoading, setActionLoading] = useState(false);
   const [showModal, setShowModal] = useState<string | null>(null);
   const [reason, setReason] = useState('');
+  const [customReason, setCustomReason] = useState(false);
+
+  const reasonPresets: Record<string, string[]> = {
+    banned: [
+      'Hate speech or slurs',
+      'Harassment or bullying',
+      'Spam or scam activity',
+      'Posting illegal content',
+      'Impersonation',
+      'Repeated violations after warnings',
+      'Ban evasion (alt account)',
+    ],
+    suspended: [
+      'Posting inappropriate content',
+      'Minor harassment',
+      'Spam behavior',
+      'Violating community guidelines',
+      'Cooling-off period after heated exchange',
+    ],
+    active: [
+      'Appeal reviewed and approved',
+      'Ban was issued in error',
+      'Suspension period served',
+      'User agreed to follow guidelines',
+    ],
+  };
 
   const fetchUser = () => {
     setLoading(true);
@@ -236,21 +262,52 @@ export default function UserDetailPage() {
 
       {/* Status Change Modal */}
       {showModal && (
-        <div className="fixed inset-0 bg-black/40 flex items-center justify-center z-50" onClick={() => setShowModal(null)}>
+        <div className="fixed inset-0 bg-black/40 flex items-center justify-center z-50" onClick={() => { setShowModal(null); setReason(''); setCustomReason(false); }}>
           <div className="card p-6 w-full max-w-md mx-4" onClick={(e) => e.stopPropagation()}>
             <h3 className="text-lg font-semibold text-gray-900 mb-1">
               {showModal === 'active' ? 'Activate' : showModal === 'suspended' ? 'Suspend' : 'Ban'} User
             </h3>
-            <p className="text-sm text-gray-500 mb-4">Please provide a reason for this action.</p>
-            <textarea
-              className="input mb-4"
-              rows={3}
-              placeholder="Reason..."
-              value={reason}
-              onChange={(e) => setReason(e.target.value)}
-            />
+            <p className="text-sm text-gray-500 mb-4">Select a reason for this action.</p>
+
+            <div className="space-y-2 mb-4">
+              {(reasonPresets[showModal] || []).map((preset) => (
+                <button
+                  key={preset}
+                  onClick={() => { setReason(preset); setCustomReason(false); }}
+                  className={`w-full text-left px-3 py-2 rounded-lg text-sm border transition-colors ${
+                    reason === preset && !customReason
+                      ? 'border-brand-500 bg-brand-50 text-brand-700 font-medium'
+                      : 'border-warm-300 hover:border-gray-400 text-gray-700'
+                  }`}
+                >
+                  {preset}
+                </button>
+              ))}
+              <button
+                onClick={() => { setCustomReason(true); setReason(''); }}
+                className={`w-full text-left px-3 py-2 rounded-lg text-sm border transition-colors ${
+                  customReason
+                    ? 'border-brand-500 bg-brand-50 text-brand-700 font-medium'
+                    : 'border-warm-300 hover:border-gray-400 text-gray-700'
+                }`}
+              >
+                Custom reason...
+              </button>
+            </div>
+
+            {customReason && (
+              <textarea
+                className="input mb-4"
+                rows={3}
+                placeholder="Enter custom reason..."
+                value={reason}
+                onChange={(e) => setReason(e.target.value)}
+                autoFocus
+              />
+            )}
+
             <div className="flex gap-2 justify-end">
-              <button onClick={() => setShowModal(null)} className="btn-secondary text-sm">Cancel</button>
+              <button onClick={() => { setShowModal(null); setReason(''); setCustomReason(false); }} className="btn-secondary text-sm">Cancel</button>
               <button
                 onClick={() => handleStatusChange(showModal)}
                 className={showModal === 'banned' ? 'btn-danger text-sm' : 'btn-primary text-sm'}