If anything like that is actually a thing, I’m starting to be pretty sure that people having dreams about memes, and then people online turning those dream memes into actual memes, is somehow going to mess with the fabric of reality. Like memes are pretty much the only things that one can witness in dreams and then more or less perfectly replicate in waking life, and have the thing become actualised in its own essence.
If you had a dream where there was a mule that was also somehow the king of Denmark, you can tell people about the dream. You can make art about it, you can depict what you witnessed as perfectly as you remembered it, but there is nothing you could do to actually make it real, to truly grab it and bring it back with you to reality. But memes can manifest from just that spark, and a meme that was real in a dream may become a meme in reality.
I wouldn’t go as far as saying that I would actually believe that turning dream memes into real memes would pose an actual danger by poking holes in the fabric of reality. But if I would, I nonetheless wouldn’t be discouraging anyone from doing so. I would want to see that happen because that would be so fucking cool.