On their personal Feeds (now integrated with Walls), users were given the option of removing updates from any application as well as choosing the size they show up on the page.
Furthermore, the community feed (containing recent actions by the user's friends) contained options to instantly select whether to hear more or less about certain friends or applications.
It is also possible to remove a user from one's friends, which is referred to as "unfriending" by Facebook. There has also been a study on why Facebook users unfriend, which found that differences, especially between ages, and few mutual friendships were the dominant factors correlated with unfriending, all of which mirrors the decline of physical-world relationships.
Facebook profiles also have advanced privacy features to restrict content to certain users, such as non-friends or persons on a specific list.
The two people are Facebook friends once the receiving party accepts the friend request.