Part of the success of social media (pprune included) is the natural and frequently unbridled need to show off, not just what we look like, what we ate and where we have been but also what we know (and by way of bragging - showing that 'I knew this before you' ). None of this is important except in an egocentric way. It may be old fashioned but perhaps self restraint and modesty should be a better better way of comporting ourselves.