Ha - how about "Bloody Mary"? I was 8 and that story scared the shit out of me. I love reading creepypastas, and when I was younger, I never knew if they were real or not. It was part of learning how to trust information. They always had enough of a disturbance in the story that made me feel odd.

I JUST saw The Backrooms (the one where she puts the tape measure down the portal) and... holy shit. This is the same level of odd feeling. I can only imagine what sort of VR stuff is out there... That Black Mirror episode has me wondering if I'll actually do something like that.

I think it's also the same sort of thing as the innocuous conspiracy theories I've seen like "Did you know that Spongebob characters are based on the seven deadly sins?" Could be true, you'll never be able to fully verify it unless you know the person who made the content, and ... sounds good and seems to hold up. Why would you want to dispel the theory even if it is untrue? It's kinda fun.