Originally Posted by
Dan Dare
Pilots are little gossips. If something unusual was up there they would ask ATC about it and report back if anything didn’t add up. To go unnoticed you would either have to be a very long way from commercial pilots or appear so normal (commercial airliner in normal colours with a sensible flight plan operating in a straight line) that nobody would bat an eyelid.
That's what I had imagined. I can't believe that a long series of such random encounters would go unnoticed and unreported.