People with very average
intelligence whose hobby is mocking flat earthers in order to feel some sort of intellectual superiority. Round earthers base their judgement not on experimental observation, but simply on the fact that they were taught "the Earth is round" growing up, not knowing that most so called "flat earthers" mock them in secrecy for their inability to formulate abstract philosophical questions in order to challenge the current institution of established
knowledge that is critical to our advancement as a
free-thinking species.