Privacy is especially difficult to define because it means different things to different people. Each of us has our own privacy needs. Women often have different privacy concerns than men; asking a 9-year-old child his age over the Net has different privacy implications from asking the same question of a middle-aged adult. A question that may not be seen as violating our privacy in one situation could have that appearance in another.
Coyle, Karen. Karen Coyle (1999). Presentations>Information Design>Privacy