It's about to get a lot worse. Realistic chat bots are only now coming into play. Soon there will be 10 bots per legitimate user in every online community that discusses politics.
2016 was the first Internet election and showed the power of "fake news" (disinformation flooding) and data driven micro-targeting in an election. Trump won partly because he ran an Internet election while Clinton ran a TV era election. (Obama had a good net game too, but 2008 and 2012 were still dominated by old media.)
The Democrats will close this gap, as will a trillion varied think tanks and pressure groups not to mention a dozen foreign governments. Combine this with the advent of AI chat bots and you have a recipe for social media apocalypse.
My specific prediction is that in 2020 mass social media will be flooded and basically DOS'd to death by automated propaganda bots and algorithmically generated fake news. Sites like Reddit will be nothing but donkeybots arguing with elephantbots. Less than half of online news will be even remotely true, especially on social media. Most will be algorithmically targeted and written propaganda.
It will be like the advent of mechanized warfare in WWI, but with bullshit. Mechanized bullshit warfare. Feel free to visualize.
Social platforms will implement censorship and other measures to attempt to fight this DOS attack but these will ruin them for humans and drive people away.
Basically mass social will die the way Usenet died, but with AI and driven by big big money propaganda efforts.
Internet discussion will retreat to private enclaves. We may see a second BBS era.
The signal to noise ratio around my kitchen table is a lot higher than on reddit (or even HN), and there are a lot fewer trolls.
We used to say "Never trust anyone you can't punch in the face."