Cambridge Analytica has now thrown in the towel, but the important questions of the recent facebook crisis remain unresolved. The network connecting and observing more than two billion people is a typical dual use technology, it can do a lot of good and also help psychological studies, but the possibilities of manipulation and misuse for political or financial gain are also endless.
My feature on this weighs both uses and asks how science should handle this dangerous tool in the future:
Watching two billion people
Current Biology Volume 28, Issue 9, 7 May 2018, Pages R527–R530
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(will become open access one year after publication)