As they always complain when these issues are discussed on AIBU or chat, I can give you an example of what typical responses from TRA's and allies would be -
'I have muted the feminism board as not to see this anti trans stuff. You've got your own space to talk about stuff. Why can Mumsnet not stop this???!!!'
They'll then pop onto the Site Stuff board and will start a thread titled (something like) 'Mumsnet, why can't you stop this??!! ' and the OP will read
'MNHQ, I cannot bring myself to see this anti trans stuff - why can't you stop them starting threads in AIBU???!!!'
It wasn't enough for them to have the FWR boards split. It wasn't enough for them for posts on the Sex and Gender board to be subject to a set of overly restrictive, board specific guidelines. It wasn't enough for Mumsnet to be subject to DDOS attacks and constant screenshot forays from Reddit.
They want to stop women talking. They can't bear that we're allowed to.