Email providers such as Gmail have long reviewed messages in order to spot spam and place ads. Facebook has said previously that its computers analyze messages to filter spam and to detect conversations that could be related to criminal behavior. The company’s guidance for developers also says that “the number of inbox messages containing” a link to a page will count as “Likes” – indicating that the recording of these links isn’t some sort of new bug.
via How Private Are Your Private Facebook Messages? – Digits – WSJ.
