“is this meme a fake?”
No. If an idea is out in the wild, being reproduced by folk then it’s not a fake meme – it is actually a meme. The given basis for starting the meme could be a total crock, but the meme itself is real. You know that because you can see it: look, there it is!
For a meme to be fake, we’d have to be talking about an activity or idea that wasn’t real, e.g. if we were all tweeting something like
LOL the #fizzwhizzcheesewhizz meme where you make a video of someone snorting spray cheese & popping candy ROFLCOPTER
and there was no shared practice of making those videos, then we’d be talking about a fake meme. Of course, if lots of us started tweeting and blogging and chatting about #fizzwhizzcheeswhizz then referring to the fictional video phenomenon would actually be a meme in it’s own right.
That’s pretty meta right there. I need to lie down.