If you look around you'll find wackos of every kind.
Some of them are trolls, I'll bet, just out to make mischief. But I personally know three people who are officially diagnosed with schizophrenia, and talking to them is sometimes illuminating, albeit extremely frustrating. Their world view is just too different to relate to.
Delusional thinking isn't just for full blown schizophrenics, either. One woman I used to work with (and I thought was normal) told me one day about her encounter with a UFO and it's alien occupants. Wow, I did not expect that from her.
When I was a very young kid, I either had visual hallucinations or maybe I was dreaming and only thought I was awake, but my experience was that I saw some really weird stuff. Stuff that can't possibly be true, so I can't exclude myself from the delusional category, either. Thankfully nothing like that has happened since.