diff --git a/src/components/map/DualMapView.tsx b/src/components/map/DualMapView.tsx
index 205b9a1..89be594 100644
--- a/src/components/map/DualMapView.tsx
+++ b/src/components/map/DualMapView.tsx
@@ -209,38 +209,11 @@ export default function DualMapView({
         </button>
       )}
 
-      {/* Indoor Map button - switch to indoor view */}
-      {activeView === 'outdoor' && (
-        <button
-          onClick={goIndoor}
-          className="absolute bottom-4 left-4 bg-rmaps-dark/90 text-white px-3 py-2 rounded-lg text-sm hover:bg-rmaps-dark transition-colors flex items-center gap-2 z-30"
-        >
-          <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-            <path
-              strokeLinecap="round"
-              strokeLinejoin="round"
-              strokeWidth={2}
-              d="M19 21V5a2 2 0 00-2-2H7a2 2 0 00-2 2v16m14 0h2m-2 0h-5m-9 0H3m2 0h5M9 7h1m-1 4h1m4-4h1m-1 4h1m-5 10v-5a1 1 0 011-1h2a1 1 0 011 1v5m-4 0h4"
-            />
-          </svg>
-          Indoor Map
-        </button>
-      )}
-
-      {/* Auto-mode indicator */}
-      {mode === 'auto' && (
-        <div className="absolute top-4 left-4 bg-rmaps-primary/20 text-rmaps-primary text-xs px-2 py-1 rounded-full">
-          Auto-detecting location
-        </div>
-      )}
 
       {/* Venue proximity indicator */}
       {currentLocation && isInC3NavArea(currentLocation.latitude, currentLocation.longitude) && activeView === 'outdoor' && (
-        <div className="absolute top-4 left-1/2 -translate-x-1/2 bg-rmaps-secondary/90 text-white text-sm px-3 py-1.5 rounded-full flex items-center gap-2 z-30">
+        <div className="absolute top-4 left-1/2 -translate-x-1/2 bg-rmaps-secondary/90 text-white text-sm px-3 py-1.5 rounded-full z-30">
           <span>You&apos;re at the venue!</span>
-          <button onClick={goIndoor} className="underline">
-            Switch to indoor
-          </button>
         </div>
       )}
     </div>
diff --git a/src/components/map/MapView.tsx b/src/components/map/MapView.tsx
index f16c4ce..b1b7c5a 100644
--- a/src/components/map/MapView.tsx
+++ b/src/components/map/MapView.tsx
@@ -57,6 +57,12 @@ function isValidCoordinate(lat: number, lng: number): boolean {
   );
 }
 
+// Check if a participant's location is stale (older than 5 minutes)
+const STALE_THRESHOLD_MS = 5 * 60 * 1000; // 5 minutes
+function isLocationStale(lastSeen: number): boolean {
+  return Date.now() - lastSeen > STALE_THRESHOLD_MS;
+}
+
 export default function MapView({
   participants,
   waypoints = [],
@@ -202,15 +208,36 @@ export default function MapView({
       let marker = currentMarkers.get(participant.id);
 
       if (marker) {
-        // Update existing marker position
+        // Update existing marker position and stale status
         marker.setLngLat([longitude, latitude]);
+        const el = marker.getElement();
+        const isStale = isLocationStale(participant.lastSeen.getTime());
+        if (isStale) {
+          el.style.backgroundColor = '#6b7280';
+          el.style.opacity = '0.6';
+          el.title = `${participant.name} - last seen ${Math.round((Date.now() - participant.lastSeen.getTime()) / 60000)} min ago`;
+        } else {
+          el.style.backgroundColor = participant.color;
+          el.style.opacity = '1';
+          el.title = participant.name;
+        }
       } else {
         // Create new marker
         const el = document.createElement('div');
         el.className = 'friend-marker';
-        el.style.backgroundColor = participant.color;
         el.innerHTML = participant.emoji;
 
+        const isStale = isLocationStale(participant.lastSeen.getTime());
+
+        if (isStale) {
+          // Grey out stale locations
+          el.style.backgroundColor = '#6b7280'; // gray-500
+          el.style.opacity = '0.6';
+          el.title = `${participant.name} - last seen ${Math.round((Date.now() - participant.lastSeen.getTime()) / 60000)} min ago`;
+        } else {
+          el.style.backgroundColor = participant.color;
+        }
+
         if (participant.id === currentUserId) {
           el.classList.add('sharing');
         }
diff --git a/sync-server/server.js b/sync-server/server.js
index 3112be2..cc6cd88 100644
--- a/sync-server/server.js
+++ b/sync-server/server.js
@@ -485,15 +485,34 @@ const server = createServer(async (req, res) => {
       let pushSent = 0;
       let pushFailed = 0;
 
-      // First, send WebSocket message to all connected clients in the room
+      // Get room to access participant names for deduplication
+      const room = rooms.get(roomSlug);
+
+      // First, send WebSocket message to connected clients, deduplicated by name
       const locationRequestMsg = JSON.stringify({ type: 'request_location' });
+      const pingedNames = new Set();
+
       for (const [ws, clientInfo] of clients.entries()) {
         if (clientInfo.roomSlug === roomSlug && ws.readyState === 1) {
+          // Get participant name for this client
+          const participant = room?.participants?.[clientInfo.participantId];
+          const name = participant?.name;
+
+          // Skip if we've already pinged this name
+          if (name && pingedNames.has(name)) {
+            console.log(`[${roomSlug}] Skipping duplicate ping for: ${name}`);
+            continue;
+          }
+
           ws.send(locationRequestMsg);
           wsSent++;
+
+          if (name) {
+            pingedNames.add(name);
+          }
         }
       }
-      console.log(`[${roomSlug}] Location request via WebSocket: ${wsSent} clients`);
+      console.log(`[${roomSlug}] Location request via WebSocket: ${wsSent} clients (deduped by name)`);
 
       // Then, send push notifications to offline subscribers
       const subs = pushSubscriptions.get(roomSlug);