diff --git a/OpenSim/Services/PresenceService/PresenceService.cs b/OpenSim/Services/PresenceService/PresenceService.cs
index 09c31c321b..c8ac38e63a 100644
--- a/OpenSim/Services/PresenceService/PresenceService.cs
+++ b/OpenSim/Services/PresenceService/PresenceService.cs
@@ -45,10 +45,20 @@ namespace OpenSim.Services.PresenceService
                 LogManager.GetLogger(
                 MethodBase.GetCurrentMethod().DeclaringType);
 
+        protected bool m_allowDuplicatePresences = false;
+
         public PresenceService(IConfigSource config)
             : base(config)
         {
             m_log.Debug("[PRESENCE SERVICE]: Starting presence service");
+
+            IConfig presenceConfig = config.Configs["PresenceService"];
+            if (presenceConfig != null)
+            {
+                m_allowDuplicatePresences =
+                        presenceConfig.GetBoolean("AllowDuplicatePresences",
+                                                  m_allowDuplicatePresences);
+            }
         }
 
         public bool LoginAgent(string userID, UUID sessionID,
@@ -57,6 +67,9 @@ namespace OpenSim.Services.PresenceService
             //PresenceData[] d = m_Database.Get("UserID", userID);
             //m_Database.Get("UserID", userID);
 
+            if (!m_allowDuplicatePresences)
+                m_Database.Delete("UserID", userID.ToString());
+
             PresenceData data = new PresenceData();
 
             data.UserID = userID;
diff --git a/bin/Robust.ini.example b/bin/Robust.ini.example
index 10edccd9c9..bc87ac286d 100644
--- a/bin/Robust.ini.example
+++ b/bin/Robust.ini.example
@@ -107,6 +107,9 @@ ServiceConnectors = "8003/OpenSim.Server.Handlers.dll:AssetServiceConnector,8003
 [PresenceService]
     ; for the server connector
     LocalServiceModule = "OpenSim.Services.PresenceService.dll:PresenceService"
+    ; Set this to true to allow the use of advanced web services and multiple
+    ; bots using one account
+    AllowDuplicatePresences = false;
 
 [AvatarService]
     ; for the server connector