If you are a site owner or a regular user, you can prevent your data from ending up in one of these "extra quality" lists by following these steps:
If you find your own data in these indexes, it means you are a victim of a breach. Using these lists to access other people's accounts is identity theft. Furthermore, the "quality" of these lists is often low; the passwords are often years old and have already been reset by the affected services. How to Protect Yourself
If you are interested in cybersecurity, searching for "index of password.txt" is the wrong way to learn. Instead, focus on these legitimate practices:
