Gosh, are you an expert in law too?!
Is it possible to be libellous when you're A) criticised under an anonymous identity (I understand there must be some kind of loss to those libelled for it to matter) and B) the statement is merely answering the perceived question raised by you (i.e. What we hate about t'internet) and is not a statement of fact? 
I am not an expert in anything. But darn it I'd be surprised if anyone was genuinely this dense.
I'm also surprised you haven't realised that you're a lot older than a lot of mumsnetters. There is no "Mumsnet age" we are all simply adults (male and female too!) with an enormous pool of knowledge and skills. One person can't compete and cannot offer what we don't already have in our midst.
You have posted as though we are all one big stereotypical "mum", flapping about and not really knowing what we're doing. We're not. We're all individuals (I'm not!).
You are a very silly sausage.
This is an odd, unnecessary thread. You are an odd, unnecessary poster.
One second you're saying "it's just words on a screen" the next we are all bullying you :o