I think that most of the people who say the Earth is flat are trolling. Unlike T-Rex, I don’t think that all flat-earthers are trolling, just most of them. I think they do it to get noticed. I think they do it to set themselves apart, and to imply that the rest of us are common and boring by comparison. And I think they do it to get a reaction, like other trolls. You’ll be able to tell the trolls from the true believers by how many questions they ask. While true believers will also ask questions in their efforts to make you see the light, the trolls will use almost nothing but questions in their efforts to manipulate you. It’s the earnestness of the true believers that will settle it. Trolls never leave themselves that vulnerable.
Flat-earthers have a lot in common with conspiracy lovers. In fact, part of the flat earth philosophy includes the belief in a round earth conspiracy. Since science and exploration are responsible for much of the evidence against flat and for round, there has to be a conspiracy to hide the flatness of the truth. So that’s another reason why people do it. They are psychologically pre-disposed to believe in an occult truth obscured by a mainstream conspiracy.
Of course, there is also that minority of people who say it because someone told them it was true. The credulous few who will believe whatever they’re told by someone they look up to, and who will fiercely cling to that belief no matter what. Generally, this group is composed of people who aren’t able to think for themselves, and who wouldn’t think of questioning the truth of something they don’t understand.
So, there you have three of the reasons why people say they believe the Earth is flat. They’re trolling. They’re conspiracy lovers. They’re credulous. If you can think of any more reasons, please let me know in the comments.
Here’s a Scientific American article on the subject, to give you the conspiratorial establishment’s spin on the flat earth. And here’s a Youtube video of Bugs Bunny proving that the Earth is globular.