Usage: SET SEND_IGNORE_MSG [ON|OFF|TOGGLE]
  When OFF, prevents the sending of "You are being ignored"
  messages when you IGNORE someone.  When ON, these messages are
  sent when then IGNORE is initiated for PRIVATE or ALL messages.

  This is a *bad* idea, because if this is ON while you are ignoring
  someone for flooding, you may very well be knocked off irc yourself
  for flooding.
