This is reasonable advice, but the most important thing is left unsaid: there is no such thing as privacy on the internet. Even if only your friends can see you

This is reasonable advice, but the most important thing is left unsaid: there is no such thing as privacy on the internet. Even if only your friends can see your photos and updates, there's nothing to stop them from taking them and making them public. The only sound advice is this: if you're worried that what you're about to say might embarrass you if it were made public, leave it unsaid. If you are worried that the picture you're about to post would be problematic if a potential employer saw it, don't post it. Articles like this give people a false sense of security.