Nearly 4 Million users of AdultFriendFinder have had their personal details, including email addresses, usernames, dates of birth, postcodes and IP addresses, exposed on the dark web for sale online. Channel 4 news site broke the story on Thursday and warned users of the California-based dating site with 64 million members who want to have sex and one night stands with strangers. The leaked data also includes the information on whether the users are gay or straight and even which ones might be seeking extramarital affairs. The data could be goldmines for hacker trying to blackmail people to extort money.
Source: https://thehackernews.com/2015/05/adult-friend-finder.html

