In case you need reminding, here’s what round looks like
❝ The U.S. flat-Earth movement is booming, according to new data that shows more Americans scoured the internet for flat-Earth theories in the last 12 months than ever before.
The Economist tracked how often Americans searched for the words “flat Earth” through Google from 2013 to today. Beating even Kylie Jenner’s famous chemtrail theory, the numbers have been growing since mid-2014…
❝ Urging caution, The Economist cites the dangers of conspiracy theories. The anti-vaccination movement, for example, has been linked to outbreaks of measles cases. Google searches for “anti-vax” exploded when the Centers for Disease Control reported a sharp rise in measles cases in 2015. Unlike the flat-Earth movement, however, this peak was not sustained.
It’s nice to see Trump supporters have an additional center of crap stupidity to keep themselves occupied. Keeps them away from self-harming and voting – for a while.
Eideard 
But three million more Americans believe the world is round than flat. Still, under arcane 18th century rules, we don’t know which way the poll will come out . . .
“Flat Earth Is the Ultimate Conspiracy : Inside the burgeoning movement.” (Motherboard Jan 2, 2018) https://motherboard.vice.com/en_us/article/8xvg9a/flat-earth-is-the-ultimate-conspiracy-youtube-facebook “…The deeper I got into the underground Facebook communities, YouTube channels, and blogs where flat earthers congregate, the more it seemed anything but benign. This is a group of people who have entirely reconstructed their universe out of self-righteousness and spite for authority. It is a worldview where dissent is demonized and pride supersedes fact. The flat earth movement is a look into a post-truth future and a canary in the coal mine of our political discourse. And this conference was the first time the growing community would leave their online forums and come aboveground.”
“How Flat Earthers Nearly Derailed a Space Photo Book : What a photographer’s struggle to raise money for his book of images tells us about Facebook and conspiracy theorists.” (NYT 8/14/19) https://www.nytimes.com/2019/08/14/science/nasa-flat-earth.html
“The issues that emerge when advertisers target political campaigns or misinformation at a specific group on Facebook have been well documented. So, too, have the problems that arise when advertisers make Facebook users uncomfortable by knowing too much about them. The fact that social media recommendations sometimes encourage conspiracy theories and radicalization is also well known.”
Facebook and other platforms have promised to address these issues. But Mr. Redgrove’s case seems to illustrate a relatively new twist in the narrative: Ads for a fact-based project seem to have been inhibited by offended conspiracy theorists.
See also “Facebook Wants To Clean Up Its Notoriously Toxic Groups” https://www.thedailybeast.com/facebook-rolls-out-new-tools-to-clean-up-its-notoriously-toxic-groups (Facebook has also been gathering members’ personal Messenger voice chats and hiring third-party contractors to transcribe the exchanged audio. https://www.nme.com/news/facebook-admits-listening-users-conversations-2538252 )
(11/17/19): “The flat-Earth conspiracy is spreading around the globe. Does it hide a darker core?” https://www.cnn.com/2019/11/16/us/flat-earth-conference-conspiracy-theories-scli-intl/index.html
Flammarion engraving (click to enlarge)