The Circle (2017):

"A woman lands a dream job at a powerful tech company called the Circle, only to uncover an agenda that will affect the lives of all of humanity."

Basically, Mae (Emma Watson) joins a social media company, The Circle, that removes any privacy from people's lives. Like, people willingly submitting themselves to 24/7 surveillance. Probably doesn't age well, but is strange for the idea that social media could become a sinister cult. Check it out!