"No personal attacks - However, "sledging" style "banter" should be taken with good grace."
The "Sledging" metaphor was unknown to me until I saw the Ed's cricket link. As cricket is the most opaque and arcane waste of time, in my opinion, I'm not surprised that that minority term rang no bells.
Ad hominem (
http://en.wikipedia.org/wiki/Ad_hominem ) seems to be what was intended. To say, for example, that the Minister's new plan for funding schools in Britain has no validity because both he and his offspring were educated at public schools, is ad hominem. Extend this to say, for example, that Twinkletopos (AB contributor) can't say that the winner of the Golden Globe deserved it because they (Twinkletopos) are a fat bottomed chav with no brain cells.
Good grace? Wasn't he some sort of cricketer? In the interests of fair play, surely both personal insults and fallacious pseudo logic, like ad hominem, should be discouraged.