Believing the earth is flat I can almost get, but why reject gravity?
Here's what I don't get. Even if they want to deny obvious reality and be a flat earther, the whole idea of gravity still works with a flat earth, but no, they have to make their worldview even more complicated and ridiculous just so they can reject all basic science and scream "No labcoat wearing dorks are going to tell ME what to believe!" like a whiny, petulant child.
They should just admit that they don't care if the beliefs they hold are actually true, that they only care that they go against all available evidence. That they *want* to reject all of reality. It would be so much easier and less complicated then pretending that there is any actual logic or sense to their beliefs.