My favorite one is the whole "no forests on flat earth" sub-conspiracy. For those of you who haven't heard, mountains and mesas are apparently the stumps of giant silicon-based (or petrified, depends who you ask) trees. Explanations why they aren't here anymore range from giants cutting them down, to the flood of the Old Testament, to aliens that were hard-up for resources, to (guess who?) the Earth's elites cutting them down to erase evidence of the old world and help usher in a New World Order. My personal favorite is that the elites cut the trees down because they were growing too tall and were about to hit the dome that the sky is apparently painted onto. Yeah, someone out there thinks Earth has a sky-box in real life. If that doesn't make you feel good about yourself, I have no idea what will.
I recommend y'all take a nice, long, relaxing wade through this beautiful ocean of garbage so y'all can see firsthand some of the very best humanity has to offer. It doesn't sink in for you that what you're reading are the actual conscious thoughts of a living human being until you're three or four pages in, really...