I'm more focused on their flawed conspiracy beliefs - all the other RE'ers have got the whole "science-da-mentic" stuff covered.
Thinking about it. The number of people involved in such a conspiracy would be staggering.
Mariners, pilots/aircrew(within reason), military, space exploration agency staff, satellite construction/maintenance staff (and parts thereof), ship construction/maintenance staff (and parts thereof), aircraft construction/maintenance staff (and parts thereof), telecomunication staff (including fibre optic skilled personell), astronomers, cartographers, fuel/oil production companies, travel agencies, universities/scientists, geologists and probably more would have to be involved.
Would there be anyone of consequence left who isn't involved in the conspiracy?
EDIT:- starting this in a new thread