Hackers have reportedly leaked onto the web highly sensitive sexual information of nearly 4 million users registered on leading dating site Adult FriendFinder, which claims to cater for up to 63 million people worldwide.

Information stolen from the site's database reportedly gives away users' sexual orientation and preferences, along with their email addresses, dates of birth and even unique internet addresses of computers. It also specifies whether users of the dating service are looking for extramarital affairs.

According to a Channel 4 News investigation, the hackers did not even spare old members who had already deleted their accounts from the dating site. The investigation allegedly revealed a secretive forum in which a hacker nicknamed ROR[RG] posted the details of users of Adult FriendFinder, claiming that the information of 3.9 million members has been leaked. Shortly after the leak, hackers on the forum reportedly said they were going to hit users with spam messages.