All very sound - there's also the problem where people ( and i include myself in this) often feel moved to comment without fully understanding the build-up to a situation, something which I would hardly ever do in everyday life, but which is more likely on-line, and not always just due to the anonymity aspect.
I made that mistake when I first joined MW, Fiverings, because I'd never been on a forum before, but quite quickly learnt that sticking my nose into situations about which I didn't know the full facts definitely wasn't welcome!
Mark stuck his nose in. I would have thought he would have known the build-up and, if not, what chance is there for anyone else to know ALL the facts about any situation. Or is it better not to comment on anything in case you step on some toes.