There is a lot of extremism and manipulation I see from the more hardcore GC side.
https://www.mumsnet.com/talk/am_i_being_unreasonable/4844841-feminist-postcards-in-the-tate-britain?page=1
The above thread claims that major London museums are selling Adult Human Female cards. They're not, it's a publicity stunt by an activist.
In the same thread it is claimed that it's illegal to say a woman is an adult human female. It is not illegal.
I see threads on here and on twitter with a photo of a gender neutral loo, claiming that women at that particular venue are forced to share with men because the only loos are mixed (the National Trust seems to be a particular target for this). However 30 seconds of thought and further research makes it clear that there are in fact single sex facilities available elsewhere on the premises.
The recent threads about Jo's cervical cancer trust publishing a page with terms like "bonus hole" on it also grossly misrepresent the facts and what that webpage is trying to achieve. It is not to erase women or force women to not use the word vagina.
There was a thread in FWR (now deleted I think, but it ran for a while) basically laughing at the fact that the TW who did the Bud Light advert was scared to leave their house because of death threats they received as a result of doing that advert.
I have seen posts and threads calling trans people "it" that have been allowed to remain, posts claiming that all TW are perverts or paedophiles, there are is even a post early on in this thread that says "there is no such thing as trans".
I am GC. I do not believe TWAW or TMAM. I believe single sex spaces are important.
I also think threads targeting particular individuals or misrepresenting situations in order to manipulate people and whip up distrust and hatred are awful, and MN is rife with this.