Because what memes are really about, usually, are communication and secret ways of knowing:
regyt asks why the world doesn't have a meme where everyone leaves screened comments with what they want to say to to the poster but haven't yet for whatever reason -- and I say, indeed, why not? So! Tell me anything you want me to know - about me, about us, about you, about your mom, whatever you like.
Anonymous comments are enabled, and everything is screened. Tell me something you want to tell me, anonymously or not. If you say you want me to unscreen, I will, happily. Keep in mind I can't reply without unscreening your comment.
Then do the same, and I will tell you something!
(I'll even try and make it something interesting...)