MrsSnippyPants I have to disagree with you there, unless you know for a fact the mum, who is your acquaintance, has Munchausen.
I think what Posy was alluding to was Munchausen syndrome by proxy, or rather Fabricated or induced illness.
Do you know she has this?
My understanding is this is "...a mental health problem in which a caregiver makes up or causes an illness or injury in a person under his or her care, such as a child..."
www.uofmhealth.org/health-library/hw180537
The fact she may be known as stunning and brave by her friends doesn't mean she is supporting her trans child because she has a mental illness, or making up a medical condition for her child.
This would mean the child was not trans identifying and the parent somehow made them so or made it up.
I am sure in a very few cases this 'could' happen but not so many for this to be a definition of how it works.
Your acquaintance is probably, as you say, an 'ordinary mum' but she is dealing with something incredibly difficult. Unless you are dealing with it too, you just don't know how hard it is.
I think it's lazy of Posy to attribute this to Munchausen syndrome by proxy or Fabricated or induced illness - it doesn't help to explain why so many young people are currently trans identifying and it just looks like she doesn't know what she is talking about.
I quite like Posy but she doesn't necessarily take a rational view to things and this sort of thing just doesn't help IMHO.