Those answers are feeble.
2. Time zones aren't a circle or even an ellipse of light. See my avatar for the areas that are sunlit some time in May/June.
3. The Coriolis effect is used even by amateur marksmen to make accurate shots past about 800m. Not to mention it's an uncontentious part of any and all calculations in professions which deal with ballistics or very precise measurements of any forces. Unless they're all in on The Conspiracy, of course.
4. Triangles aren't only conjecture, clearly:
if Aberdeen is due north of Almeria and Aalborg is due north of Tunis, the way all maps, compasses and journeys agree they are then there's got to be some reason that the north pair are 700km apart and the south pair 1100km. Either, the earth is flat and the only route people have ever taken between them is curved and nobody has ever realised that there's a shorter one, or the earth is a sphere.
6. How would a flat disc ever let you see one half of a rotating sphere from the centre, the bottom half directly overhead no matter where you are on the rim and a corresponding part of the self same unchanging sphere depending on where you're stood anywhere else?
I'm out of time and I'm losing the will to live but suffice to say that while the FE enthusiasts are happy to ignore all those problems, they remain problems. If you want to discuss any of them in particular, I'd start a thread for it and keep it focused. If you pile a bunch of serious problems in at once, people will find the easiest one to rationalise, rationalise it to their own satisfaction and bail on the whole thread.