You know what. We don't need the rawmode event after all:

on *:ban:#: bklog $1-
on *:kick:#: bklog
alias -l bklog {
  window $iif($event == kick,@kicks,@bans)
  if ($event == kick) {
    echo -t @kicks [kick tracker] $nick kicked $knick from $chan on $date at $time
  }
  else {
    var %b = 1
    while ($ialchan($banmask,$chan,%b).nick) {
      echo -t @bans [ban logger] $nick set the following ban $1- against the user $v1 on $time $date in $chan
      inc %b
    }
  }
}

It was as simple as adding the $1- after the event parameter.