Drupal - How to disable a module and its dependents modules with Drush?

You should update your drush by the sounds of things. Doing drush dis views should result in the following:

drush dis views
The following extensions will be disabled: views, views_bulk_operations, og_ui, views_content, og_example, views_php, views_ui
Do you really want to continue? (y/n)

Which means the dependents are disabled at the same time.