How to delete a Hack This Site account?
The description of the service:
HackThisSite.org, commonly referred to as HTS, is an online hacking and security website. It aims to provide users with a way to learn and practice basic and advanced "hacking" skills through a series of challenges, in a safe and legal environment.
Deletion complexity:
Not possible
It is not possible to delete your Hack This Site account. The best you can do is delete any personal information that you have stored on their website.