No credit card data has yet been uncovered as part of the hack.That data is incredibly revealing and potentially damaging.

That, combined with his username and other account details, gave Robb enough information to Google him, find his real name, and find his social media pages.

The information exposed can be particularly devastating to people living in small towns, where they are more easily identified.

AFF is pretty blunt about what it is and what it offers, with a site description that promises the potential to "Hookup, Find Sex, or Meet Someone New" for its subscribers.

In this incident, the users whose information may have been leaked won't just have to contend with the usual issues normally associated with a data breach (spam, hacked accounts, identity theft and exposed credit card info).

" wrote a hacker who goes by "MAPS." Friend Finder Networks Inc., parent company of Adult Friend Finder and other adult sites and publications including Penthouse, said in a statement that it had just become aware of the breach, and it is working closely with law enforcement and cyberforensics company Mandiant, a subsidiary.

The company said it doesn't yet know the full scope of the breach, but it promised to "work vigilantly," noting that Friend Finder Networks "fully appreciates the seriousness of the issue." "We cannot speculate further about this issue, but rest assured, we pledge to take the appropriate steps needed to protect our customers if they are affected," the company said.

The influx of spam makes sense in this case, since the information found on the leaked lists are enough to profile and single out individuals not just for blackmail purposes, but for phishing campaigns baited with targeted social engineering tactics.

Adult Friend Finder asks customers to detail their interests and, based on those criteria, matches people for sexual encounters.

The site, which boasts 64 million members, claims to have "helped millions of people find traditional partners, swinger groups, threesomes, and a variety of other alternative partners." The information Adult Friend Finder collects is extremely personal in nature.

When signing up for an account, customers must enter their gender, which gender they're interested in hooking up with and what kind of sexual situations they desire.

Stolen data from some 3.9 million members of Adult Friend Finder was leaked by hackers, according to an investigation by Britain's Channel 4.