Remove Aghosts from "Warp to Most Followed" (#41448)

* init

* review

Content.Shared/Follower/FollowerSystem.cs

@@ -35,6 +35,7 @@ public sealed class FollowerSystem : EntitySystem
     [Dependency] private readonly ISharedAdminManager _adminManager = default!;
 
     private static readonly ProtoId<TagPrototype> ForceableFollowTag = "ForceableFollow";
+    private static readonly ProtoId<TagPrototype> PreventGhostnadoWarpTag = "NotGhostnadoWarpable";
 
     public override void Initialize()
     {
@@ -320,11 +321,17 @@ public sealed class FollowerSystem : EntitySystem
         var query = EntityQueryEnumerator<FollowerComponent, GhostComponent, ActorComponent>();
         while (query.MoveNext(out _, out var follower, out _, out var actor))
         {
-            // Exclude admins
+            // Don't count admin followers so that players cannot notice if admins are in stealth mode and following someone.
             if (_adminManager.IsAdmin(actor.PlayerSession))
                 continue;
 
             var followed = follower.Following;
+
+            // If the followed entity cannot be ghostnado'd to, we don't count it.
+            // Used for making admins not warpable to, but IsAdmin isn't used for cases where the admin wants to be followed, for example during events.
+            if (_tagSystem.HasTag(followed, PreventGhostnadoWarpTag))
+                continue;
+
             // Add new entry or increment existing
             followedEnts.TryGetValue(followed, out var currentValue);
             followedEnts[followed] = currentValue + 1;