While some would say the risks of the Facebook study were obvious, Professor Hancock said the researchers did not realize that manipulating the news feed, even

While some would say the risks of the Facebook study were obvious, Professor Hancock said the researchers did not realize that manipulating the news feed, even modestly, would make some people feel violated. I have to call bullshit on this. The whole point of the study was to see how their emotional state would be affected. Prior to this, no one would have expected to be "experimented" on while using a consumer web product.