I don't use Facebook because of this. There's not much the company can do to prevent people from making things public about you that you'd rather keep among friends. How is Facebook to know the implications of you being at one party vs another? Sharing is sharing. Just because you keep your profile locked down doesn't matter when someone else can share whatever they like with whomever they like. I understand not having a profile doesn't completely prevent this, but it helps make it a lot less public. Nobody will receive a notification linked to my profile that I was tagged in a photo because there's no profile to associate. We're past the point of being able to prevent this entirely, but I'm not going to make it any easier.