Why do people like social networking sites so much?

Is it insecurity or just the need to communicate? Or is there really a need at all?

Why do people like social networking sites so much?
Perhaps it is because the cyber world has opened up a means to communicate in a way that otherwise shy people can't do on a one-to-one, face-to-face basis? There is a difference in taking the time to think and typing out the words in the seclusion of your computer room than having to respond in the "flesh". Insecurity? Sure! Yet the need to communicate still exists. We'd better communicate! No man/woman is an island. Lack of communication is the world's greatest problem because if there is no communication, there can be no understanding whatever the means of communication. Great question!
Reply:So they can spy on people they went to high school with.
Reply:I think that is a way for all of us bored, lonely people to get out there and talk to more, bored and lonely people.