The article isn't mainly about the subject in the title, it's more of a general review of the hearing. However, regarding the question in the title: It is hard

The article isn't mainly about the subject in the title, it's more of a general review of the hearing. However, regarding the question in the title: It is hard to understand anything if you don't try. The article mentions that people were asked before information were shared, but somehow did not understand the implications about that, or did not even read the approval before giving it. So my answer would be: Their hope is great great if they care and carefully go trough their privacy settings and read approval messages before giving. Lousy if they don't care and don't read anything on their screen. So maybe the solution isn't trying to bring in Zuckerberg into congress and everybody's home to have an introductory course in Facebook privacy settings. Maybe it's about teaching each other about how internet works and making people more aware of how what they share could be used - which might make some users actually care about understanding?