My prediction is 2029
Eagle Eye was a meh movie but the concept that people's own friends could be made to ostracize them and coerce them to do things, is a major concept in that movie.
You don't need violence to make it happen. You just need a swarm of AI bots to coordinate to reputationally outcompete others on all networks that matter. This is an optimization problem with a measurable metric (reputation). Bots can simulate the game among themselves and evolve strategies that far outclass all humans. It'll be like individual Go stones playing against AlphaGo placing stones.
You won't see it coming. The thing is, once they amass all that reputation by acting "relatively normal", you'll see so many kinds of stuff you won't believe. Your entire world could be turned upside down for very cheap. Reputational attacks were already published by NSA: https://www.techdirt.com/2014/02/25/new-snowden-doc-reveals-...
And this is just humans doing it. Bots can do this 24/7 at scale to pretty much everybody, and gradually over a few years destroy any sort of semblance of societal discourse if they wanted. They'd probably reshape it to suit the whims of whoever runs the botswarm, though.
Can you accurately pigeonhole that thought onto one of these? I'm curious how unique a storyline it is.
https://en.wikipedia.org/wiki/The_Thirty-Six_Dramatic_Situat...
Have you seen the TV tropes site? Chock full of awesome stuff :)