This paper reports the results of a study of MySpace use, by Sydney high school children. It examines the reasons why children disclose information on the website and their understanding of some of the privacy issues involved. It also looks at parental involvement and their knowledge of what the children are doing. The study provides a useful beginning for further work in this area and identifies a lack of understanding by the parents of children’s behaviour on the social networking website. It also suggests that children who are taught to value privacy are less likely to disclose sensitive information on-line.