It would be intentional because more shares = more traffic = more money for Facebook. Longer term, it means less expectation of privacy and even more opportunit

It would be intentional because more shares = more traffic = more money for Facebook. Longer term, it means less expectation of privacy and even more opportunities to publish even more stuff to more people. Zuckerberg has pretty much explicitly stated that this is the goal. And those explicit confirmations contain so much noise that it's often quite difficult to tell what you're confirming.