I'be noticed an increased number of flat earth graffiti and the likes in my city recently. I don't know whether they're serious or not in their beliefs, I don't

I'be noticed an increased number of flat earth graffiti and the likes in my city recently. I don't know whether they're serious or not in their beliefs, I don't care either way. It is funny to see some people get so bent out of shape on the matter though.