While not disagreeing that Facebook et al. pose a problem, the real problem is that you can't evade surveillance as you lay a digital trail of almost everything

While not disagreeing that Facebook et al. pose a problem, the real problem is that you can't evade surveillance as you lay a digital trail of almost everything you do in your live. Your phone is location-tracked, every non-cash payment is tracked, the sites you surf onto are tracked (by your provider at least), your medical dossiers are electronic and pass eventually through public parts of the net, automatic face recognition is about to become ubiquitous,... So no, leaving Facebook or Google solves only a tiny part of the problem.