xkcd 2176, “How Hacking Works”. This made an appearance in some places, when the xkcd forums were pwned.
Nullius, I actually read your post and I thank you for posting that. I never visited that pwned site, but I'mma check it out soon as I down my last 40 ounce, know what I'm sayin'? Been a rough week.
You’re welcome. HTH.
Have I Been Pwned? is sufficiently “notable” to have a Wikipedia page:
https://en.wikipedia.org/wiki/Have_I_Been_Pwned%3F
It is also a popular tag on security.SE.
The site simply offers you a way to check if your data are already floating around in an underground world that most people don’t know exists. Sites get compromised every day. Blackhats sometimes offer the information for sale, or just share it for the lulz. To the public, ignorance is bliss—until they personally suffer from criminal usages of their information.
Sometimes, the site has “interesting” challenges. See how its operator, Troy Hunt, decided to handle the mess when Ashley Madison and Adult Friend Finder (see updates at the bottom) were hacked:
https://www.troyhunt.com/heres-how-im-going-to-handle-ashley/
Most people do not understand why I am so strict about security and privacy. They are naïve.