My privacy from others is generally safe, privacy from whoever Facebook decides to sell my data too clearly isn't.
Nobody is forcing you to put that data on there.
About the only thing FB could get from my account is that I support Manchester United. Good for them.
Funny you should that,I was surfing the net one time cant remember what I was looking at and a facebook advert poped up with friend of mines profile.
Blame your friend for his/her relaxed view on security then. FB data concerns are nothing new, they're documented well and everyone should be responsible for their own account.
Common sense is all that is needed.
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