The Internet this week has been buzzing about the rise of Yo, the incomparably stupid new mobile app that has raised more than $1 million and whose sole purpose is to let you send a message that just reads “Yo” to your friends. In fact, Yo is such a flat-out brain-dead idea that it’s inspired iMore’s Derek Kessler to do the one thing no one should ever do with apps like these: Think about their broader implications for the future of the human race. “Yo is dumb,” he states bluntly. “It’s a dumb concept, it’s a dumb use scenario, it’s a dumb app. That it’s taken on this bizarre life of its own is utterly perplexing and flummoxing. For all the