Addendum: I googled "Mitsein" and this is brilliant. What I want is a self-erasing Twitter-like that knows this:
"The term "Being-with" refers to an ontological characteristic of the human being, that it is always already[8] with others of its kind. This assertion is to be understood not as a factual statement about an individual, that he or she is at the moment in spatial proximity to one or more other individuals. Rather it is a statement about the being of every human, that in the structures of its being-in-the-world one finds an implicit reference to other humans. We all live with others, and in fact we could not live without them. Humans have been called (by others, not by Heidegger) "ultrasocial"[9] and "obligatorily gregarious."[10] Without others of our kind we could not survive. Heidegger, from his phenomenological perspective, calls this feature of human life "Being-with" (Mitsein), and says it is essential to being human.[11] We are inauthentic when we fail to recognize how much and in what ways how we think of ourselves and how we habitually behave is influenced by our social surroundings. We are authentic when we pay attention to that influence and decide for ourselves whether to go along with it or not. Living entirely without such influence, however, is not an option."