I've used the term, argument for argument's sakes and I stand by that, it does seem to be a recent and regrettable phenomenon on NBN. A verbal game of chess for some? I can quite understand it if this is a factor in Richard's decision to leave the forum. I do think that on some topics Richard has been bullied by some. Such a shame as he has so much to share with us all.
Take a break, Richard, ignore the trolls, you'll be welcome back.