Stanford used to have a "persuasion technology" ("Facebook") class for deliberately maximizing trustworthiness and manipulating users. Interaction and style design are like nonverbal behavior: it's never "apolitical" or "unbiased", unavoidably omnipresent, and has real-world consequences, especially at scale.

https://www.nytimes.com/2011/05/08/technology/08class.html

( https://archive.is/WXgXt )