Enable/disable views in code

gistfile1.php

<?php
/**
 * Disable a view or views
 * 
 * @param mixed $disable_views
 *   An array of view machine names or a machine name to disable
 */
function example_disable_views($disable_views = array()) {
  if (!is_array($disable_views)) {
    $disable_views = array($disable_views);
  }

  $views = variable_get('views_defaults', array());
  foreach ($disable_views as $view) {
    $views[$view] = TRUE;
  }
  variable_set('views_defaults', $views);
}

/**
 * Enable a view or views.
 * 
 * @param mixed $enable_views
 *   An array of view machine names or a machine name to enable
 */
function example_enable_views($enable_views) {
  if (!is_array($enable_views)) {
    $enable_views = array($enable_views);
  }

  $views = variable_get('views_defaults', array());
  foreach ($enable_views as $view) {
    $views[$view] = FALSE;
  }
  variable_set('views_defaults', $views);
}