Friends are tied to each other through emotions, customs, and norms. With social media, we can share information about our friends without their permission and legal restrictions. We can share information even beyond our friendship network.

As we apply for jobs, prospective employers will likely use social media to learn about us and judge us. Therefore, what our friends show to the world matters.

In recent years, oversharing information gave rise to an army of monitors and spies that imposes surveillance and top-down control of our online lives.

We know that Facebook controls our interaction by what shows up in our newsfeed from our friends. Third-party companies also use our in...