functions.php

<?php
/**
 * Display Posts Lockdown
 *
 * Disables the ability to query by post status and certain post types
 *
 * @author Bill Erickson
 * @link http://www.billerickson.net/code/display-posts-lockdown
 *
 * @param array $args, WP_Query arguments
 * @param array $atts, Shortcode attributes
 * @return array $args
 */
function be_display_posts_lockdown( $args, $atts ) {
  $args['post_status'] = 'publish';
  $excluded_post_types = array( 'revision' );
  if( isset( $args['post_type'] ) && in_array( $args['post_type'], $excluded_post_types ) )
    $args['post_type'] = 'post';

  return $args;
}
add_filter( 'display_posts_shortcode_args', 'be_display_posts_lockdown', 10, 2 );