Ever have a friend Join your server??  Well now if they do, YOU CAN TEASE THEM  All you need to do is get there Name (Minecraft Ign, RealLife name, ect.) then go to the config and choose what will happen when someone types /<yourFriendsName>  You can say a custom message to the whole server.   For example, If someone does /<YourFriendsName They the whole server would get a message (set up in the config) such as "Andy Is A NEWB!!!"