This is my take as well. It's the business model itself that's toxic, or at least predatory, as the necessary outcome of it is to lean as hard as possible on kn

This is my take as well. It's the business model itself that's toxic, or at least predatory, as the necessary outcome of it is to lean as hard as possible on known frailties of human behavior and psychology in order to cultivate advertising placement and revenue. There's no tinkering around the edges of that control loop that's going to fix the problem. What we observe as the deleterious effects on society are in fact systematic (as in, "design failures") faults in the thesis of Facebook's business model.