In principle no, but in execution, yeah sorry no. FB completely dropped the ball. When you have that many users you can't just go let me experiment and see if I

In principle no, but in execution, yeah sorry no. FB completely dropped the ball. When you have that many users you can't just go let me experiment and see if I can make people sad. The range of people on your service is too high for that. All it takes is one suicide that can be accurately tracked back to someone in that segmentation and FB is fucked, deservedly. For something like that, the name of the game is informed consent. Let people opt into or out of the experiment. That's what people conducting an actual study would do. Not just randomly start experimenting on the public which is essentially what FB did