Ignorance or Arrogance from other riders

In the last week I have been out and about in the Basingstoke area. On my last two rides I have passed many a rider in the opposite direction than I. I smile, wave a hand and if I'm not breathing out my backside will say a hello. I can honestly say that only 3 have acknowledged my existence. 4 if you count the fella in a white jersey black tights who rode Huish Lane yesterday morning: http://app.strava.com/segments/1441705 . He looked at me as if I had a second head when I said Good Morning.