I would prefer mumsnet to add a messgage/ disclaimer onto the discussion to say that they have ascertained (or suspect) that the poster is not legitimate... A blank thread with a short message saying 'that's all folks!" is so frustrating!
It's like in that episode of The Big Bang Theory (for those of you who have seen it...) where Amy is testing Sheldon's OCD need for closure and she wipes away the noughts and crosses game just before Sheldon can play the winning move. I know I need to get a life...