Wait, that isn’t a parody sub?

Nope. The phenomenon is more widespread than people realize. Here's an Aeon piece worth reading about it

https://aeon.co/essays/how-the-psychiatric-narrative-hinders...

Parody subreddits have a bad habit of becoming serious.

I think the big surprise of the internet and subsequently the SCP wiki's focus on cognitohazards and "killer memes" is that the phenomenon in it's own way is an extreme version of a real danger - as a species we are really not well equipped for the information environment we've built, and it's prudent to tread very cautiously.