Here's the thing. The flat earth shit is absolutely useful at seeing who is worth having a discussion with or not. It's a perfectly good way to separate the thinkers from the sheep.

You and I both know the Earth is round, the flat earth model is rediculous. And like all rediculous things it's funny as heck. Now if you see the flat earth model getting floated and your response is anything beyond bewildered amusement, like anger at people for being that stupid or a virtue signalling desire to set the record straight "guys the Earth is ROUND!!!! ROUND!!!" you're just a dumbass falling into the troll trap.

Thing is the reason why the flat earth shit makes people so angry is because they don't have a sense of humor. And alot of that is because it poles holes into their ego. You see we all know the Earth is round but some of us haven't bothered to think through why the Earth is round beyond simply believing what we've been taught and the flat earthers are good at hitting on just that weak point. So unless you've confidence in yourself to simply admit you don't know enough about science to refute them, which is a perfectly valid position we can't all know everything about everything, or you do know enough about science to refute it and realize it's not worth your time to bother with arguing with someone who won't care to awknoledge objective reality, you're gonna be in the third camp of the idiots, stupid people convinced they are right. The Dunning-Kruger effect if you will.

People confident in the Earth's shape don't take offense at people calling it flat anymore than someone confident in their sexuality takes offense at being called a fag. Either you are or you aren't who care what someone else thinks?