I know the Earth is round because I have watched the Sun progress through the Seasons. I have markers that tell me when the Solstice or Equinox occur. I have on many occasions observed the Space Station traveling from Horizon to Horizon in a Strait Line. It's course does not curve like is shows in the 2D models.
I have been as high as 12,000 feet above sea level on foot. I could see the curve of the Earth. I have been on mountains at night above populated area's and I could see the curve of the Earth.
I have had first hand, face to face, 1:1 conversations with SR-71 Pilots who have told me about their personal experiences. I believe them over you, sorry.
I am all for Freedom of Speech and you can believe what ever foolishness you like. I have no problem with that. But I do have a problem with you going after people who dare to disagree with you. Trying to cause them harm, shutting them down and attempting to limit their Free Speech through downvoting and defamation. I know that Stefan is not the only one you have gone after. You really need to stop your Authoritarian Fascist Bullying of people.