Go to the following website and read about a study conducted by Facebook in 2014: users-emotions-news-feeds
It is a lengthy article, so allow time to read and digest

What are the ethical issues surrounding this research?

Why were people so upset about it?

Finally, explain what is meant by the following quote:
“it seems there is a cultural agreement in our society that a magic ring exists around consumer research such that it is
OK to be studied surreptitiousiy as consumers but not OK to be studied for any other purpose.”