BOAC said:
We might even be able to help with the 'unknown parties'
OK, in further developments, the 'Barber' person who's been messaging me apparently does mean well towards me and his warning was, I guess, friendly. The person who put the weirdness up HIS nose (by email) turns out to be a former user here who went by the handle "airfoilmod." I found a brief discussion, in the archives, of his disappearance from here. Funnily enough, BOAC was involved in that discussion. I guess I'm not concerned any more about proving my bonafides: I have no bonafides! And I have said so! I guess THAT is what some people cannot wrap their minds around.