So every Facebook user deserves to have their privacy invaded because they have an account on that site? Facebook should have been clear about what the feature

So every Facebook user deserves to have their privacy invaded because they have an account on that site? Facebook should have been clear about what the feature did, what it didn't do, and how it used their account. They also should have sent emails out warning users of the feature's activation. Facebook does this all the time, but they'll get off the hook yet again just because they're Facebook. Sigh...