Data is now officially the most valuable commodity on the planet. Cambridge Analytica realised this some time ago, and decided to monetise it. Cambridge Analytica harvested your Facebook data, including everything you ever 'liked'. They set up questionnaires that profiled Facebook users, then analysed this data (apparently, each of these users has ~50,000 points of useable data), and they sold it to the highest bidder. In the UK, the highest bidder was "Leave" (America was Trump), so Cambridge Analytica, (who admitted to mining data from ~87 Million Facebook users), sold your data, and how they sold it was by (allegedly?) paying Facebook to target its members with targeted ads, and selling the resulting 'you' to their client. Not everyone was targeted in the campaign, just those who, according to the data analysis, were unsure as to which way to vote, along with those These people were (allegedly) targeted with ads from Facebook. Ads that tried to sway their view/vote. Not only that, but your 'feed' suddenly became enriched with views from 'friends' who were going to vote 'Leave'... allegedly. And we know that people want/need to be part of the group... right? tl;dr... Cambridge Analytica have since ceased trading, and Facebook have paid Cambridge Analytica's fines, but if you look into it, with even the slightest degree of open-mindedness, you'll surely realise that Cambridge Analytica (and Facebook?) have been complicit in (party to?) (Constructs of?) the finest of social engineering, whereby you only heard/saw feeds from your 'friends' who wanted the UK to leave the EU. No tinfoil hat necessary. This is how politics now works. If you're not sure how to vote, Facebook will (allegedly?) tell you how to vote. Google is (ironically) your friend. E2A: I do realise that nobody is going to post here and admit that they were the victim of social engineering. It's not how we work.