Simon... I know you want this to be an "open forum"... But what is the benefit of having these misguided children take advantage of the "openness" by posting pure nonsense ?
They don't have anything interesting or informative or humorous to say.
They are only destructive (as children whom are not watched by adults typically are).
I see NOTHING to the benefit of "openness" when it is taken advantage of like this.. they are not arguing a point of any sort.
If they were arguing a point.. I don't care how nasty it is, I would probably read it to see what they were talking about.
This... just drags down the rest.
If you delete them... they will get bored and go elsewhere.