I suppose all the pilots could be 'IN' on the 'conspiracy' of a flat earth?

Sure, but there is no flat earth conspiracy. There are also no pilots that do (or ever could) go “perfectly straight” for the distance required to reach the origin point. Going perfectly straight is very hard, even on the order of a single mile.

If you are interested in exploring these ideas further, please join us on flatearthresearch! I assure you it will be worth your while and rewarding, assuming you are earnest. Flat earth research isn’t what you have been heavily advertised to believe it is!