[Adrian Schneider]

Not tested...

PHP Code:

<?php

if (!is_object($vbulletin->db))
{
    exit;
}

$removePoints = 10;
$daysInactive = 1;

$cutOff = TIMENOW - (86400 * $daysInactive);

$result = $vbulletin->db->query_read("
    SELECT userid
    FROM " . TABLE_PREFIX . "user
    WHERE lastactivity < $cutOff
");

while ($user = $vbulletin->db->fetch_array($result))
{
    $vbulletin->db->query_write("
        UPDATE " . TABLE_PREFIX . "user
        SET reputation = reputation - $removePoints
        WHERE userid = $user[userid]
    ");
}

?>

You'll have to update their reputationlevelid as well... don't have time to look into that though.