I think people join the SNS for not only staying close with friends but also sharing sense of values and getting the opportunity to carry out it. For example, launching new business, making sports club..., actually, Egypt revolution in this month occuerd from the activity on Facebook, I heard. The information in the SNS is relatively liberal and put in order for effective using. People from all over the world exchange their opinion without violence. SNS has a possibility of changing world, I think so.