lol :p Well, if you really want to shrink WorldDMT's script a tiny bit further, you can do this:

menu status,nicklist,menubar {
  -
  WorldDMT Clones Detector V1.0 $iif(%stat.wclone,-[ ON ]-,-[ OFF ]-)
  .$iif(%stat.wclone,Dis,En) $+ able it:set %stat.wclone $iif(%stat.wclone,0,1)
  -
}
on *:join:#:{
  goto $iif($nick = $me,x,y) | :x | set %/who $+ # 1 | who # | halt | :y
  if %stat.wclone && $ialchan($wildsite,#,0) > 1 {
    echo # 7- clones detected $+($chr(3),4,$chr(91),$chr(3)) $regsubex($str(x,$v1),/x/g,$&
      $+($chr(3),14,$ialchan($wildsite,#,\n).nick,$chr(3),$chr(32))) $+($chr(3),4,$chr(93),$chr(3)) | halt
  }
}
raw *:*:{
  if (($numeric = 352) && ($($+(%,/who,$2),2))) haltdef
  elseif ($numeric = 315) && ($($+(%,/who,$2),2)) unset %/who $+ $2 | haltdef
}

I have changed the join event a little, as well as a typo, which to be in French, and made the enable and disable switch a bit smaller. But it's not that much of a difference in size, just a few bytes off. :P