Simple answers are not necessarily correct answers. Some of them are looking for attention. Some of them are seriously ill. Some of them are looking for money. Some of them really believe what they're saying; some of them really believe it and don't actually talk about it. Probably a fair number of them just heard something that sounded plausible to them and haven't learned enough to know that they are wrong. That doesn't make them irrational, just ignorant. And ignorance isn't deplorable until it becomes willful ignorance.

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Gillian

"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"

"You can't erase icing."

"I can't believe it doesn't work! I found it on the internet, man!"