The last events in the north of Africa and the meadle east have shown how interactive and powerful the social networks are.
They start with a node that attracts other nodes who could imagine sharing some common interest. Hence a network system is built and takes several forms, contents, etc. This system has a high le vel of sensibility to himself and to his environment.
Every environmental event can change him. Also, he can adapt himself to make some changing on its own environments.
Social Networks reflect the Human behavior and can change it. Human can change easily and can be influenced by his own networks.
Social networks are a new real generation of Interactive Systems