Update _index.md

Author: mrcbax

content/_index.md

@@ -77,6 +77,16 @@ template = "radar.html"
     </div>
     <div class="margin-top" style="font-size: 1.5em;">
       <nav class="centered">
+If you are here because of a message in your minecraft server console, this wasn't us and is a harassment campaign from a griefing group
+Your server is not hacked they are just sending messages in your chat from the dynmap plugin/mod
+To fix this open the dynmap config and change the setting
+``` 
+ - class: org.dynmap.SimpleWebChatComponent
+    allowchat: true
+    # If true, web UI users can supply name for chat using 'playername' URL parameter.  'trustclientname' must also be set true.
+    allowurlname: false
+```
+allowchat to "`false`"
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