This is a simple autokill system for use by admins. Basically, when someone gets killed on a channel, it gives you the option to set an automatic kill every time they reenter. It sets their address as the check, instead of their nick. The SNOTICE part may need the $6 changed, depending on your server.

Updated

#autokill off

on *:SNOTICE:*Client exiting:* kill by *: {
  var %am.kill = //echo $?!="Add to Auto Kill?"
  if (!%am.kill) {
    return
  }
  else {
    am.killkeep $6
  }
}

on *:JOIN:#: {
 .signal -n _killcheck $nick
} 

on *:TEXT:_killcheck*:*: {
   .signal -n _killcheck $nick $2-
}

alias am.killkeep {
  var %nick = $address($1,13)
  .set %killlist $addtok(%killlist,%nick,44)
}

alias am.autokill {
  if (!$1) {
    var %nick = $$?="Nickname:"
  }
  if ($1) {
    var %nick = $1
  }
  var %reason = Auto Kill Requested
  am.killkeep %nick
  .kill %nick %reason
}

on *:SIGNAL:_killcheck: {
  if (!$2) {
    var %nickcheck = $address($1,13)
    if ( $istok(%killlist,%nickcheck,44) ) {
      .kill $1 [Auto Kill]
      goto end
    }
    else {
      return
    }
  }
  if ($2) {
    if ( $2 == Remove ) {
      var %nickremove = $address($1,13)
      if ( $istok(%killlist,%nickremove,44) ) {
        var %a = $matchtok(%killlist,%nickremove,0,44)
        while (%a) {
          $remtok(%killlist,%nickremove,%a,44)
          dec %a
        }
        goto end
      }
    }
    if ( $2 == List ) {
      if ( %killlist ) {
        echo $color(notify) -at [Auto Kill List] $sorttok(%killlist,44)
        goto end
      }
      else {
        echo $color(notify) -at [Auto Kill List Empty]
      }
    }
  }
  :end
}

#autokill end

menu * {
  -
  AutoKill ( $+ $group(#autokill) $+ ): {
    if ($group(#autokill) == off) { .enable #autokill }
    else { .disable #autokill }
    .echo $color(notify) -at [ Autokill ] $group(#autokill)
    }
  -
  Remove from List:.signal -n _killcheck $$?="Nick?" Remove
  - 
  Autokill List:.signal -n _killcheck List List
  -
}