An old principle here perhaps: evolution does not mean making an organism more complex or "better" necessarily, only "more adapted", so sometimes more complex organisms can become less complex organisms, such as cave fish losing their ability to see. Similarly, perhaps with memes. Better adapted memes mean just that, better adapted, even if they are completely insane from one way of looking at things. So if the meme of say plastic wishbones mentioned in this article is adapted for some crazy reason, it will find a niche. This is the dark side of evolution. Sometimes organisms lose features and complexity for the sake of adaptation, and perhaps there is a memetic corollary here to, sometimes in the free market the most adapated memes are some of the most insane or revolting, from an aesthetic standpoint. Which just proves the "selfish gene/meme" paradigm - if they can get copied, they will, and they don't care about whatever pain or suffering or cultural decline that may occur as a result.