I don't know, I must be getting very cynical in my old age.
But every time I read something that seems altogether outrageous, and guaranteed to generate a lot of reaction from Mumsnetters, the op has never posted on Mumsnet before.
Btw, I never say "I think you are a troll" because I understand this to be taboo on here.
I just leave the thread and sometimes come back to lurk.
But it seems people are often very quick to take the op at face value, and I am sorry they are being taken for a ride.