But on the other hand, there are also disadvantages. For example, The people who spend more time on the social network too much, they are not interested other people , it may have been fraudulent and malicious purpose in accordance with the appointment to meet at a news in newspapers. If you spend too much time on the social network you may be worse grade. If you are on a computer screen for a long time, some may be nearsighted or blind. Some of the Site, Services may disclose personal information. May was not well used in any way or violate human rights. Using the computer too much not enough sleep and the body weak.