Change the #\r\n# to something else, anything else, this will stop people from being able to use it. Save it.
You can do the same thing to eliminate any command you don't like, or wish to change. #NONAME, #NICKNAME #MESSAGE , #MOTD, #TOPIC. Or anything else for that matter. Happy Hunting.
This same general concept can also be used to edit out commands from ouka chat server. The only difference is the file you will want to change will be named Chatserver.exe . And the location of the file will depend on where you extracted it to.