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.

Asked why he was doing this, Auernheimer said: "I went straight for government employees because they seem the easiest to shame." Millions of others remain unnamed for now, but anyone can open the files -- which remain freely available online.

That could allow anyone to extort Adult Friend Finder customers.

For instance, the security consultant Robb reported that one person whose information was hacked was a 62-year-old Hispanic male from New Jersey, who worked in advertising and has a preference for the "subporno" forum.

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.

For example, one person exposed in the hack is a 40-year old welder from a small Illinois town of a few thousand people.

He "will become anybody's slave" and lied about his age on the site, claiming to be 29.

Are you concerned that your private information has been exposed? Included in the exposed personal information are customers' email addresses, usernames, passwords, birthdays and zip codes, in addition to their sexual preferences.

No credit card data has yet been uncovered as part of the hack.