You stare at your screen. Your online friend Leon just talked about something only your family would know. You never told him anything about this, how did he find out about it ? Leon has been your online friends for a few months. You shared things about each other's life, nothing wrong with that but... You know for a fact you never shared that with him. You start to wonder how much he knows about you that you're not aware of. Did he always know about your account on different platforms? Did he look at your family members' Facebook account? He must have caught himself saying as he quickly send another message to change the subject but you didn't want to let him get away with sharing an information he isn't spposed to know.