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It's optimistic to believe it mostly affects gullible people (whatever gullible means to you). https://www.nytimes.com/2014/06/30/technology/facebook-tinkers-w

• jaclaz 9y ago
  Well, from the article you cited: >Mr. Kramer wrote that changing the emotional makeup of the news feeds had a minimal impact, prompting users to produce an average of one fewer emotional word per thousand words over the following week. What I am saying is that I find unlikely that they can change the voting preference, if not that of really gullible (or if you prefer "very easy to manipulate") people.