View source for This nickname may not be used

When I try to change my nick, I get the following message:
 <NickServ> This nickname may not be used.  Please choose another one.
 <NickServ> Nick TheNick may not be registered or used.
And other variations on the theme.

This is not the same as when someone else is already using TheNick.

==The Nick is Forbidden==
* You may not use nicknames that are the same as common network services.
** For example, you can not use the nicknames such as NickServ, ChanServ, Bot, and other related nicks. 
* You may not use nicknames that are intended to mimic common network services, even if the name of that services isn't being used on this network.
* You may not use nicknames that are intended to mimic staff, or other users.
** This includes cute spelling spoofs intended to trick users.
* You may not use some nicknames clearly used to offend or generate turmoil.

==Little possibility of appeal==
The Mibbit Staff considers all conditions, and how it will impact users before forbidding a nickname.
* If you have a valid reason why you think you should be able to use a forbidden nickname, you may take it up with the Mibbit Staff.
** Note that unless you present a very clear and valid reason at the outset of your appeal, your request may not get you the expected results.
*** Asking us to let you use the nick ''NickServ'' might get you shot.