Social Network System

The existence of  Social Network like Facebook, Twitter, Skype etc have become  social phenomena that very phenomenal. For example, within a period of 6 years, Facebook users has reached 400 million, or more precisely until now has reached 547,562,200 people,

as can be seen in  www.checkfacebook.com in  Indonesia State was relatively with the largest number of Facebookers, which has exceeded 10 million. According www.checkfacebook.com, Indonesia is ranks second after the United States, namely the number of users as many as 30,108,220 people.
The existence of the Social Network has been controversial because there are many opinions or conflicting arguments about the benefits or impact on society. Cannot be denied that Social Network can be used as a means of gathering in cyberspace or a media information or the delivery of information in sequence. But not least the report on the negative impacts, such as defamation, fraud, and sexual harassment, and even pornography. But the controversy did not stop the growth of facebook users that still relatively high.