"Facebook" is probably one of the most popular social networking site nowadays and have a lot of users all over the world. However, despite the fact that it is attractive and easy used social platform, it's users are not safe from various possible privacy risks. Moreover, it is generally known that in order to protect personal data the collection, use and disclosure of personal information are regulated by law, but differently in different countries... So does that really works? In this book is presented my analysis of USA, EU and Lithuanian law, in order to answer the question "does social networking site "Facebook" legally collect, use and disclose users' personal information?".