Earlier quoted context omitted.
"it creates bad feelings" If this is the hypothesis they are testing for, the problem is they subjected people to a psychological experiment without consenting to it, for the ultimate purpose of their own financial gain. How is that not malicious intent?
If you dislike a _b_ version of an a/b tested site to the point that you feel deeply dissappinted by it, were the people who designed the experiment operating with a malicious intent? I don't think facebook engineers or data scientists care what people feel when they're adjusting their models, they only care about time spent on their platform or some other overly reductionist metric. One could argue that chasing supe…
What if an almost-suicidal person got the "b" version?
A/B testing should be used when you think, in good faith, that BOTH "a" and "b" versions could be good and want to know which one works better, not to confirm a hypothesis that "b" has a negative impact on users' personal lives.