Facebook is the leading social network nowadays, with more than 1500 million active users in the world and 17 million in the national level. It is a platform oriented to sharing and communication with other people and public and private institutions of information, photos, videos and links. Facebook also offers the possibility of sending private messages to contacts (known as supporters or fans) as well as other unknown people who are also on this network. Facebook also allows to create events and inviting other people to participate in them.