Twitterbots. Duh.

What surprises me is that there is a big hullabaloo over this. It's obvious that twitterbots, fake news sites, and fake Facebook accounts would be the new tools of propaganda. The question is, what will Facebook, Google, and Twitter really do about it?

https://www.engadget.com/2016/11/20/twitter-bots-rampant-during-election/