
Usage: /HIDE [ON|OFF [CHANNEL]]
  Make yourself or current channel invisible.  When you are
  invisible, no one will see you online when they use the
  /LIST command, and when they send messages to you they'll
  see a "not sent" message, etc..  Command without the ON or
  OFF argument will display current visibility state.

  Example:
     /HIDE on
     /HIDE off channel

