Ahhh, sarcasm. LOL. Sorry. You have not dealt with flat earthers. There is literally nothing too absurd for them such that there is no possibility in knowing if someone is being sarcastic.
Whatever you think is so absurd that someone would think it is sarcasm, real flat earthers will take that to the next order of magnitude. When being sarcastic in a flat earth forum or post, it's advisable to indicate the sarcasm.
Poe's law.
I have discussed with flat earthers, they are quite absurd, that's why I said about the balloon, haha.