It's simply a matter of reality that memes with funny pictures and clever text go viral, while the latest research paper from the Journal of the American Medical Association does not. For people who reject facts, an appeal to emotion might work. In the science wars, some positions are so well-supported by mountains of data ('vaccines are safe and effective'), that every literate adult should embrace them. But that's okay hypocrisy is misunderstood.
Now, having said that, I'm going to praise memes, the Internet version of a bumpersticker. In summary, bumperstickers represent the shallow, narcissistic nature of American political discourse. I hate bumperstickers for two reasons: (1) I do not want to know every political opinion held by the people driving in front of me on I-5 and (2) They often boil down extremely complex topics into ridiculously oversimplified mottos.