Mine

on *:TEXT:!clearban:#:{
  if ($nick isop $chan) {
    rembanz $chan
  }
}
alias rembanz {
  var %a = 1
  while ($ibl($1,%a)) {
    var %c = $v1, %a = %a + 1
    if ($regex(%c,/^~c:.*$/i)) { noop lol }
    else {
      var %bans = %cbans, %cbans = %bans %c, %n = $numtok(%cbans,32)
      if ($calc($len(%cbans) + %n + 1) >= 300) {
        mode $1 - $+ $str(b,%n) %bans
        var %cbans = %c, %n = 0, %bans = 0
      }
    }
  }
  mode $1 - $+ $str(b,%n) %cbans
}
on *:unban:#:{ 
  if $bnick { .notice $bnick You have been unbanned from $chan } 
}
}