It falls under the same guideline as every other gif meme. So for clarification, it is not so much a particular meme which is banned, but rather a moderation initiative to discourage the use of memes and one-liners which serve to negate debates or opinions by reducing them into pointless generalizations.
Hatersgonnahate, thisisneogafdude, etc are really just annoying dumb shit which we can do without. Since this is a fun community thread most of the time, I don't think it requires heavy moderation for every little thing. But that doesn't mean that we should let ourselves slip below a certain standard.
I hope that clears it up. I don't want to be a party pooper.