This was terrifying and we are done as humanity
It was inevitable, cause most people are dumb.
The downside of these platforms connecting billions of people is that eventually someone would try to use it to motivate people to do more than buy shoes or Chicken nuggets. It's kinda a double edge sword, if Cambridge doesn't take the data and use it the way they did for Trump and Brexit, I'd bet money that people would be against all the filtering and blocking Facebook is doing now.
Imagine in 2015 if Facebook came out and said it was going to ban ads/memes/pages that were used to spam Pro Trump, Brexit Black Lives matter, Blue lives matter, Anti hillary, don vote propaganda. People would have screamed and cried about big brother and 1984. Imagine if Tumblr had deleted the Russian bot pages that were pretending to be black lives matter advocates who were also critical of Hillary It took them actually tipping elections and getting caught red handed for people to begin to understand how dangerous it would be to let the internet be like the wild west.
Downside is now we have to trust companies to be the gate keepers, because when everyone had free reign, the bad gus played dirty. I personally know people who were targeted and still believe stuff they saw on social media that could be easily proved false by a google search, dumb people will see a meme or a "headline" on a post and believe it without any critical thought or follow up.. Sh!t, maybe we are doomed.