Snapchat, the mobile app that lets users send “self-destructing” photos, has the distinction of being the only digital tool that does not have a single redeeming feature. While the moral panic associated with blogs, cell phones, social networks and online games has largely faded in grudging recognition of their more positive uses (indeed, research shows that many parents have actually helped their children lie about their age register for Facebook accounts), Snapchat is seen as the Q-tip of the digital age: its sole function is to do the thing that you’re warned not to do on the box.