Tracking your phone's gyroscope, scanning your messages and giving your data to third-party companies.
These are just three of the things you agree to when signing up to some tech companies' apps and sites.
BBC research has found some of the language used in privacy policies and terms requires a university education to be understood.
Gaming disorder may be a newly recognised condition, but disordered gaming is anything but new. In 2010, a Korean couple was arrested for fatal child neglect spurred by an obsession with Prius Online. Five years earlier, another Korean man collapsed and died after a 50-hour session playing StarCraft in an internet cafe.
More than 3000 offences of grooming children online for sex have been committed by paedophiles since the new law on sexual communication was introduced April 2017.
The NHS should provide social media and technology addiction counselling, a leading psychiatrist as said as he called for the growing problem to be classed as a public health issue.
Facebook is asking British users to send naked photos of themselves to the social network, to try to stop revenge porn.
If you're worried an intimate photo of you could be shared by someone else, the idea is to get it blocked before it appears online.
The happiness levels of nearly 10,000 girls and boys were tracked between the ages of 10 and 15. Girls who spent more than an hour a day on social media from the age of 10 were more likely to suffer problems.
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