Online services are harvesting vast amounts of data from children, who may not be aware of what they are giving away, according to cybersecurity expert Tom Gaffney from F-Secure. Social media and gaming sites can scan everything from a user’s contact list to hard drives connected to their computer, while criminals also target children in popular online games. Advertising companies hold up to 72 million ‘data points’ of information on the average 13-year-old child, according to 2017 research by advertising company SuperAwesome. Gaffney advises against children using such apps due to fears over how data is collected and used.