Index: binaries/data/mods/public/gui/lobby/lobby.js
===================================================================
--- binaries/data/mods/public/gui/lobby/lobby.js
+++ binaries/data/mods/public/gui/lobby/lobby.js
@@ -112,6 +112,16 @@
 var g_Kicked = false;
 
 /**
+ * Don't display automated role changes on login.
+ */
+var g_MuteNotificationTimeout = 5000;
+
+/**
+ * Remember when clients joined in order to mute notifications of automated role changes.
+ */
+var g_JoinedTime = {};
+
+/**
  * Notifications sent by XmppClient.cpp
  */
 var g_NetMessageTypes = {
@@ -129,6 +139,7 @@
 
 			for (let button of ["host", "leaderboard", "userprofile"])
 				Engine.GetGUIObjectByName(button + "Button").enabled = false;
+			Engine.GetGUIObjectByName("chatInput").hidden = true;
 
 			if (!g_Kicked)
 				addChatMessage({
@@ -148,6 +159,7 @@
 			updateSubject(msg.text);
 		},
 		"join": msg => {
+			g_JoinedTime[msg.text] = new Date().getTime();
 			addChatMessage({
 				"text": "/special " + sprintf(translate("%(nick)s has joined."), {
 					"nick": msg.text
@@ -168,6 +180,36 @@
 		},
 		"presence": msg => {
 		},
+		"role": msg => {
+			Engine.GetGUIObjectByName("chatInput").hidden = Engine.LobbyGetPlayerRole(g_Username) == "visitor";
+
+			let me = g_Username == msg.text;
+			if (!me && new Date().getTime() - g_JoinedTime[msg.text] < g_MuteNotificationTimeout)
+				return;
+
+			let role = Engine.LobbyGetPlayerRole(msg.text);
+			let txt =
+				role == "visitor" ?
+					me ?
+						translate("You have been muted.") :
+						translate("%(nick)s has been muted.") :
+				role == "moderator" ?
+					me ?
+						translate("You are now a moderator.") :
+						translate("%(nick)s is now a moderator.") :
+				msg.data == "visitor" ?
+					me ?
+						translate("You have been unmuted.") :
+						translate("%(nick)s has been unmuted.") :
+					me ?
+						translate("You are not a moderator anymore.") :
+						translate("%(nick)s is not a moderator anymore.");
+
+			addChatMessage({
+				"text": "/special " + sprintf(txt, { "nick": msg.text }),
+				"isSpecial": true
+			});
+		},
 		"nick": msg => {
 			addChatMessage({
 				"text": "/special " + sprintf(translate("%(oldnick)s is now known as %(newnick)s."), {
@@ -227,6 +269,7 @@
 
 	initGameFilters();
 
+	g_JoinedTime[g_Username] = new Date().getTime();
 	Engine.LobbySetPlayerPresence("available");
 
 	// When rejoining the lobby after a game, we don't need to process presence changes
Index: source/lobby/XmppClient.cpp
===================================================================
--- source/lobby/XmppClient.cpp
+++ source/lobby/XmppClient.cpp
@@ -765,12 +765,12 @@
  */
 void XmppClient::handleMUCParticipantPresence(glooxwrapper::MUCRoom*, const glooxwrapper::MUCRoomParticipant participant, const glooxwrapper::Presence& presence)
 {
-	//std::string jid = participant.jid->full();
 	std::string nick = participant.nick->resource().to_string();
 	gloox::Presence::PresenceType presenceType = presence.presence();
 	std::string presenceString, roleString;
 	GetPresenceString(presenceType, presenceString);
 	GetRoleString(participant.role, roleString);
+
 	if (presenceType == gloox::Presence::Unavailable)
 	{
 		if (!participant.newNick.empty() && (participant.flags & (gloox::UserNickChanged | gloox::UserSelf)))
@@ -814,6 +814,8 @@
 		}
 		else if (m_PlayerMap.find(nick) == m_PlayerMap.end())
 			CreateGUIMessage("chat", "join", nick);
+		else if (m_PlayerMap[nick][2] != roleString)
+			CreateGUIMessage("chat", "role", nick, m_PlayerMap[nick][2]);
 		else
 			CreateGUIMessage("chat", "presence", nick);