Assuming you do find a working login from a list (unlikely but not impossible), you are exposing yourself to significant risks.

: Sometimes the password is hidden inside the .nfo text file bundled with the download.

The list is "too large." A genuine list of working logins would be tiny. If the file is 50MB, it's filled with garbage or malware. usenet password list

However, using Usenet password lists comes with significant risks. First and foremost, there are security concerns. When users share or use credentials from these lists, they expose themselves to potential hacking and identity theft. Moreover, many of these lists are outdated or contain incorrect information, leading to frustration and wasted time. Additionally, service providers often block or throttle access from IP addresses known to be associated with leaked credentials, impacting the overall performance and reliability of the service for all users.