It's curious how a particular app changes the language and interaction culture of behavior. For example, there was a Facebook course at Stanford by a self-styled persuasion researcher who delved into how user interfaces and appearances of websites forms the basis of an impression in the viewer's mind. And then, from that basis, encourages or discourages behavior based on the technical behavior of the website. From there, it would then influence and shape the individual's beliefs and attitudes as much as any traditional PR manufacturing of consent. (Cambridge Analytica, 2016 Russian US election hack)