I don't feel attacked :) Some of these folks have indeed been randos from the Internet. Some of them are people that I've known well in real life and I'm convinced they genuinely think this. I could be fooled - I wouldn't know - but on my list of possible explanations, a desperate need for more attention than they otherwise get is high on the list.
I would suggest that it's possible this need is subconscious, and if they're believing nonsense because that need is so great, I'd consider that a mental illness.