In Facebook there are various settings for your friends lists. You can let anybody see the, you could let friends see them or you can keep them private.
But my personal details are on your friends list. Have you asked my permission to let others have it? Are you passing my personal details to somebody else without my permission? If you have dodgy friends, or click on data mining algorithms are you breaking the law? Do you ever use your facebook account for business – then the answer might just be yes.
Data mining and aggregation is big business – without it facebook and google would find life much harder. And then there are companies like Cambridge Analytica.
There are some people that protect themselves as much as possible, but they can be let down by friends. As people try harder to get our data we need to start thinking about each other – don’t share each others data.
A bit like a pandemic – we take care of ourselves to take care of others.