In my sci fi novel draft (currently in editing), this is a topic that comes up a handful of times.

Much of the social media in the book is key-based, and some analysts are dealing with overwhelming AI slop and examine social graphs and such.

I don't portray it as a silver bullet (very expensive misinformation attacks like the ones they are dealing with in the book can exploit existing social graphs and build new ones), but the analysts nonetheless use social graphs to fish out some of the drowned truths.