That has been the problem since Facebook created the concept of social networking. You created an account on a system that you had no control over and uploaded your stuff believing it would be safe, when you know nothing about what those who control the servers are doing. But it became clear that it's not a good idea to store everything in one place, not only because of the danger of hacking, but also because of what they are capable of doing with that information. Just remember that Trump won the first election thanks to the data they used from millions of people to better sell his campaign, and they will surely continue to do so.