I made the mistake of looking at their internet forum a few years back. There's no talking sense into them - whenever you give them an argument they can't answer, you're "unmasked" as part of The Conspiracy. None of them ever managed to explain why such a lot of effort would go into convincing people that the world has a certain shape, however. Who would benefit?

There's a good documentary on Netflix about them. Many of them are outsiders who have never experienced any kind of comradeship before joining up, so they tend to stick with it even when the penny drops and they realise how ridiculous their conspiracy theory really is.

i have seen youtube videos and appearances on this morning, these people are clueless. nothing they say makes any sense and instead of trying to prove it themselves, some how they offered up money for others to prove them right? bizarre.

if you watch videos of items being sent into space and recorded, you can see the warp from the earths shape.

these cant be dismissed as being edited, i also doubt nasa and other agencies would dedicate their lives to lying about the earth round. in fact, supposedly the earth is not a perfect circle its misshaped and this was mentioned on a ted talk by that famous expert in america.