Tread carefully. Check if the content is meant to be public. If you discover a company’s private data, practice responsible disclosure: notify the website owner.
In the end, the index page is just a tool. Like any tool, its value depends entirely on the hand that wields it. Have you ever discovered something surprising in a parent directory? Share your story (anonymously) in the comments—or use the knowledge above to secure your own web server today. index of parent directory
Options -Indexes Then create an index.html file in every empty directory (or use a default fallback). Set in your server block: Tread carefully