摘要：With the booming popularity of Online Social Networks ("OSNs"), a tremendous number of users share personal informa-tion, activities, opinions, photos, and videos on OSNs, which is giving rise to growing privacy concerns among various stakeholders, includ-ing providers of OSNs, marketers, and other users on the social net-working sites. OSNs brought the voluntary disclosure of personal da-ta to the mainstream, thus exposing users' published information with potential abuse.1Privacy concerns pertain to the acquisition of personal data and the potential risks that users may experience over the possible privacy breaches.2At the same time, despite the pres-ence of some privacy norms and regulations, there are relatively few well-established institutional rules and contracts governing OSNs, which gives rise to opportunism
