I often get the "it happens anyway" response when I mention predators and sex-segregated spaces.
What's a good response?
I'm sure someone has a better one, but I go along the lines of "One rape or sexual assault is one too many. Anything that reduces safeguarding should be avoided. I'm not willing to sacrifice even one woman's safety for a man to feel comfortable peeing. As trans women commit crimes at similar rates to other men, and male predators identify as trans to gain access to women and girls, this reduces safety for women and girls. At least now if there's a man in a woman's space he can be asked to leave."
Or
"How many women and girls being sexually assaulted or raped would it take to reach the point at which men need to be told to respect trans-identified males in male spaces? For me, I am not willing to sacrifice even one woman's safety. Ever. You obviously think differently, so I'm wondering what that number is."
Or
"Nobody thinks every man is a rapist, but we don't let them in female spaces anyway, in part, because some are."
Or
"I don't think you/your male relative is a rapist, but he still doesn't have a right to be in women's spaces. It's not just about being raped, it's about dignity. If trans women require dignity away from other men, they should have it, but then they need their own space. Surely they wouldn't feel comfortable sharing spaces with GC women anyway, right?"
Or variations in those themes depending on my mood and level of pissed-offness!