diff --git a/src/Impostor.Api/Net/Messages/S2C/Message01JoinGameS2C.cs b/src/Impostor.Api/Net/Messages/S2C/Message01JoinGameS2C.cs
index 6bd38c94..902bd666 100644
--- a/src/Impostor.Api/Net/Messages/S2C/Message01JoinGameS2C.cs
+++ b/src/Impostor.Api/Net/Messages/S2C/Message01JoinGameS2C.cs
@@ -22,6 +22,7 @@ namespace Impostor.Api.Net.Messages.S2C
             writer.EndMessage();
         }
 
+        [Obsolete("JoinGame errors are no longer used by 2021.11.9 and up, disconnect clients instead.")]
         public static void SerializeError(IMessageWriter writer, bool clear, DisconnectReason reason, string? message = null)
         {
             if (clear)
diff --git a/src/Impostor.Server/Extensions/IHazelConnectionExtensions.cs b/src/Impostor.Server/Extensions/IHazelConnectionExtensions.cs
new file mode 100644
index 00000000..d46e3704
--- /dev/null
+++ b/src/Impostor.Server/Extensions/IHazelConnectionExtensions.cs
@@ -0,0 +1,30 @@
+using System.Threading.Tasks;
+using Impostor.Api.Innersloth;
+using Impostor.Api.Net;
+using Impostor.Api.Net.Messages.S2C;
+using Impostor.Hazel;
+
+namespace Impostor.Server
+{
+    public static class IHazelConnectionExtensions
+    {
+        /// <summary>
+        /// Disconnect a connection using a custom message.
+        /// </summary>
+        /// <param name="connection">The connection to disconnect.</param>
+        /// <param name="message">The message to disconnect with.</param>
+        /// <returns>Task that should be awaited to ensure disconnection.</returns>
+        public static async ValueTask CustomDisconnectAsync(this IHazelConnection connection, string message)
+        {
+            if (!connection.IsConnected)
+            {
+                return;
+            }
+
+            using var writer = MessageWriter.Get();
+            MessageDisconnect.Serialize(writer, true, DisconnectReason.Custom, message);
+
+            await connection.DisconnectAsync(DisconnectReason.Custom.ToString(), writer);
+        }
+    }
+}
diff --git a/src/Impostor.Server/Net/ClientBase.cs b/src/Impostor.Server/Net/ClientBase.cs
index 74224fcc..15dfe919 100644
--- a/src/Impostor.Server/Net/ClientBase.cs
+++ b/src/Impostor.Server/Net/ClientBase.cs
@@ -5,8 +5,6 @@ using Impostor.Api;
 using Impostor.Api.Innersloth;
 using Impostor.Api.Net;
 using Impostor.Api.Net.Messages;
-using Impostor.Api.Net.Messages.S2C;
-using Impostor.Hazel;
 using Impostor.Server.Net.State;
 
 namespace Impostor.Server.Net
@@ -55,15 +53,7 @@ namespace Impostor.Server.Net
 
         public async ValueTask DisconnectAsync(DisconnectReason reason, string? message = null)
         {
-            if (!Connection.IsConnected)
-            {
-                return;
-            }
-
-            using var writer = MessageWriter.Get();
-            MessageDisconnect.Serialize(writer, true, reason, message);
-
-            await Connection.DisconnectAsync(message ?? reason.ToString(), writer);
+            await Connection.CustomDisconnectAsync(message ?? reason.ToString());
         }
     }
 }
diff --git a/src/Impostor.Server/Net/Manager/ClientManager.cs b/src/Impostor.Server/Net/Manager/ClientManager.cs
index a4ab5cc0..94426bf2 100644
--- a/src/Impostor.Server/Net/Manager/ClientManager.cs
+++ b/src/Impostor.Server/Net/Manager/ClientManager.cs
@@ -8,7 +8,6 @@ using Impostor.Api.Events.Managers;
 using Impostor.Api.Innersloth;
 using Impostor.Api.Net;
 using Impostor.Api.Net.Messages;
-using Impostor.Api.Net.Messages.S2C;
 using Impostor.Hazel;
 using Impostor.Server.Config;
 using Impostor.Server.Events.Client;
@@ -85,25 +84,19 @@ namespace Impostor.Server.Net.Manager
                     _ => throw new ArgumentOutOfRangeException(),
                 };
 
-                Message01JoinGameS2C.SerializeError(packet, false, DisconnectReason.Custom, message);
-
-                await connection.SendAsync(packet);
+                await connection.CustomDisconnectAsync(message);
                 return;
             }
 
             if (name.Length > 10)
             {
-                using var packet = MessageWriter.Get(MessageType.Reliable);
-                Message01JoinGameS2C.SerializeError(packet, false, DisconnectReason.Custom, DisconnectMessages.UsernameLength);
-                await connection.SendAsync(packet);
+                await connection.CustomDisconnectAsync(DisconnectMessages.UsernameLength);
                 return;
             }
 
             if (string.IsNullOrWhiteSpace(name))
             {
-                using var packet = MessageWriter.Get(MessageType.Reliable);
-                Message01JoinGameS2C.SerializeError(packet, false, DisconnectReason.Custom, DisconnectMessages.UsernameIllegalCharacters);
-                await connection.SendAsync(packet);
+                await connection.CustomDisconnectAsync(DisconnectMessages.UsernameIllegalCharacters);
                 return;
             }
 
diff --git a/src/Impostor.Server/Net/Redirector/ClientRedirector.cs b/src/Impostor.Server/Net/Redirector/ClientRedirector.cs
index a96ca733..f463abb6 100644
--- a/src/Impostor.Server/Net/Redirector/ClientRedirector.cs
+++ b/src/Impostor.Server/Net/Redirector/ClientRedirector.cs
@@ -56,27 +56,25 @@ namespace Impostor.Server.Net.Redirector
                 {
                     Message01JoinGameC2S.Deserialize(reader, out var gameCode);
 
-                    using var packet = MessageWriter.Get(MessageType.Reliable);
                     var endpoint = await _nodeLocator.FindAsync(gameCode);
                     if (endpoint == null)
                     {
-                        Message01JoinGameS2C.SerializeError(packet, false, DisconnectReason.GameMissing);
+                        await DisconnectAsync(DisconnectReason.GameMissing);
                     }
                     else
                     {
+                        using var packet = MessageWriter.Get(MessageType.Reliable);
                         Message13RedirectS2C.Serialize(packet, false, endpoint);
+                        await Connection.SendAsync(packet);
                     }
 
-                    await Connection.SendAsync(packet);
                     break;
                 }
 
                 case MessageFlags.GetGameListV2:
                 {
                     // TODO: Implement.
-                    using var packet = MessageWriter.Get(MessageType.Reliable);
-                    Message01JoinGameS2C.SerializeError(packet, false, DisconnectReason.Custom, DisconnectMessages.NotImplemented);
-                    await Connection.SendAsync(packet);
+                    await DisconnectAsync(DisconnectReason.Custom, DisconnectMessages.NotImplemented);
                     break;
                 }
 
diff --git a/src/Impostor.Server/Net/State/Game.Data.cs b/src/Impostor.Server/Net/State/Game.Data.cs
index d6d87bf2..26f2e5b9 100644
--- a/src/Impostor.Server/Net/State/Game.Data.cs
+++ b/src/Impostor.Server/Net/State/Game.Data.cs
@@ -382,7 +382,6 @@ namespace Impostor.Server.Net.State
 
                 case InnerPlayerControl control:
                 {
-                    if (GameState != GameStates.Started)
                     if (GameState != GameStates.Started && GameState != GameStates.Starting)
                     {
                         GameNet.GameData?.RemovePlayer(control);