Yeah, you have to go through an endless ice desert, filled with sniper teams and before you reach the edge there is a huge ass wall, literally stolen from fucking Game of Thrones.
There is this documentary supposedly happening with a couple of flat earthers traveling to the edge. Last thing I heard was too many famous flat earthers jumping off.
"Know what? Yes, take me to the edge. I'll go willingly. But if there's no edge and we end up going in a circle, you have to post a public apology and campaign against your former tribe. Deal? If there is an edge I'll do the same. The other deal is I start blasting if you try and jump me so why not prove your theories instead?"
That oughta shut em up for a while. They know deep down they're wrong, they'd never take you up on that.