This reads like a perfect case of extremely tenous correlation passed off as causation for the sake of media hysteria. Sure, some teens react to Instagram posts in self destructive ways, just as some teens react to all kinds of otherwise normal things in self destructive ways. And so? The problem there lies with the mental health treatment of those teens, not by insinuating that a whole normally ordinary category of human activity should be considered "problematic" because it happened to adversely affect a few abnormally mentally unbalanced individuals. Reminds me of the whole "violent video games cause violent behavior and school shootings" nonsense, which was just as absurd a hackneyed media-generated nonsense with no evidence-based backing used to generate views.