Anti-trans is a lazy, frivolous way of closing down what's lately turned into a very serious debate.
I've read a good few threads on the subject on Mumsnet. What I've seen is a real concern about self-identification, that any man can deem himself 'living as a woman' to receive access to women's space. There are concerns that it would be, in effect, an open-door policy for would be abusers to gain legitimate access to their potential victims. There are already stories of upskirting, recording, spying and voyeurism in shared changing facilities. And were these shared spaces to become the norm, these instances can only increase.
The trans rights activists have voiced objections to these concerns that can generously be described as insubstantial. First is 'it won't happen'. Thanks for the vote of confidence, guys. The fact is it can, and does, and sex crime against women by men is already de facto legal by virtue of the woefully low reporting rate and even lower conviction rate. Second: transwomen have been sharing toileting facilities with women for generations, without any issue and probably without anyone even noticing. This is true. But it's disingenuous to claim that self-ID and a wholesale legitimizing of this practice would not put women at increased risk - from opportunists if not transwomen. What about our rights? I've been a victim of rape, stalking and sexual assault. I would prefer not to share changing facilities with any other being - man or transwoman - with a penis. Thirdly, there are concerns about convicted rapists such as Karen White being granted access to female prisons to continue their revolting crimes under the umbrella of 'trans rights'.
These are serious and legitimate concerns. I've not seen many bona fide objections to calling a transwoman by a female name and adhering to their choice of profile, provided that the rights of women are not being trampled on to appease those who don't - who cannot - share the bodily vulnerabilities and experiences of those built with weaker bodies that can be more easily overpowered - and penetrated.
The problem is, that they are.