Online Social Networks (OSN) are an integral part of todays Web. The next generation of social engineering attacks is even more deceptive; they employ an automation software called a socialbot that controls a profil in an OSN, and has the ability to execute basic online social activities. The results show that OSNs, such as Facebook, can be infiltrated with a success rate of up to 80% depending on users privacy settings, a successful infiltration can result in privacy breaches.”]
Source: http://securityaffairs.co/wordpress/44/social-networks/the-socialbot-network.html