Great points, I wonder if FB actually employees psychologists and if so how many and what are their accreditations and level of professional experience.
Is there proof though? Id assume so, Im not sure psychologists follow a Hippocratic oath if they did this seems like it would cross a bit of a line, no?
Just one google search away. Keywords such as Facebook, psychology, experiments, ethics will generate lots of interesting reading, some of it with good sourcing and links for further reading.
It does for me, but there is always some excuse. Usually the mortgage or something to that effect.