You are allowed to find a device useful (i.e. gain value out of it) without being productive on it. That is why e-Readers sell a lot - they are useful. We're ar

You are allowed to find a device useful (i.e. gain value out of it) without being productive on it. That is why e-Readers sell a lot - they are useful. We're arguing about productive use cases here and that in my mind does not include commenting on facebook walls. If that is a narrow viewpoint then that's fine with me.