I was off to bed just after my last post, petallus and did reflect that I could have put that better. That is the danger of being drawn into an exchange when you are tired from a day month with a pinched sciatic nerve that screeches when you move and aches when you sit still.
I am not into dishing out insults. If anything you should be flattered that you seem to have the confidence to speak out and challenge a point. My point was that many do not, and are on the forum for chat and company, not to engage in debate. However, after reading an exchange they might pm one of the protagonists to agree or disagree. Rather as they might not join in a spirited discussion on a bus, even one in which several strangers were already contributing opinions, but they might well comment as an aside to their neighbour, or later to someone who was involved.
That is not the same as tittle-tattle or ganging up as a clique.
I still think that private messaging has more going for it than against it. As with everything, it can be used or abused, but it does a lot of good.