When you share with Facebook friends, you share with all the apps they use - 5 views
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Scott Moss on 09 Apr 12Raganwald describes a Facebook privacy-leak that's creepy even by Facebook standards. When you sign up for apps, the app-maker has the power to extract all your friends' personal info , assuming they've shared it with you. So anything you share with your friends can be hoovered up by any app they trust.