I think the flat Earth movement is secretly brilliant. Reading through the stuff on Twitter, for example, reads like a debate on any political matter. I have to think that the leaders(?) of the movement are in on the joke and it’s intended to be a proxy/parody of other debates of controversial matters. The real-life results (as shown in the poll) flow from that.
Given that one of those Flat Earther guys launched himself in a homemade rocket recently, I think risking life and limb is taking the joke a bit far.
https://www.washingtonpost.com/news/speaking-of-science/wp/2018/03/25/an-amateur-rocket-maker-finally-launched-himself-off-earth-now-to-prove-its-flat/