“Dating, hookup and sex community” website, AdultFriendFinder is the latest victim of a massive data hack. The details of nearly 4 million users’ personal data has been posted to an anonymous darknet forum by hackers.

According to Channel 4 News, the amount of identifying and personal information that leaked is staggering.

The stolen data reveals the sexual preferences of users, whether they’re gay or straight, and even indicates which ones might be seeking extramarital affairs. In addition, the hackers have revealed email addresses, usernames, dates of birth, postal codes and unique internet addresses of users’ computers.

What’s even worse, is that the anonymous a-holes in the forum where the information was posted, said they intend to send out spam emails with virus’ attached, but they’re not stopping there. Next on their list is blackmail.

[H]ackers will now begin trawling through the data for potential blackmail targets. The spreadsheets contain addresses linked to dozens of government and armed services personnel, including members of the British Army.

At the moment, California based company FriendFinder Networks says they’re investigating and taking the matter very seriously. The company is also urging any users who haven’t already, to change their password to something they don’t use for any other accounts.