private static function is_site_active( $blog_id ) {
            global $wpdb;

            $blog_info = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->blogs} WHERE blog_id = %d", $blog_id ) );

            if ( ! is_object( $blog_info ) ) {
                return false;
            }

            return (
                true == $blog_info->public &&
                false == $blog_info->archived &&
                false == $blog_info->mature &&
                false == $blog_info->spam &&
                false == $blog_info->deleted
            );
        }