I just don't like the sneery "well none of them pass anyway" derrogatory comments that some posters seem to take delight in posting.
I don't think it's sneery or derogatory. Exasperated and annoyed, yes. You can only frame "they never pass" as derogatory if you think there's something wrong with not passing. I think most of FWR would concur with me that there's nothing inherently wrong with not passing and being visibly trans. Miranda Yardley doesn't pass, is out as transsexual (his words, and yes he encourages us to use male pronouns), doesn't use female spaces, and accepts biological reality. There's nothing wrong or bad about Yardley not passing. He's not somehow worth less as a human because I can see that he's male. In fact, I respect his honesty with himself and others.
As to the "some always pass" vs "none ever pass" argument:
Sexual violence causes trauma and hypervigilance. A woman who has been raped or molested, and is hence extremely wary of men and hypervigilant as to their presence and behaviour, will notice tiny details that other people won't even notice. That woman might not even be aware that she's noticed the details. There's a case history in "The Gift Of Fear" (content note: rape, rather victim-blamey) where a rape victim realises that her rapist plans to kill her and runs, saving her life, and it's only later that she realises that she had subconsciously registered him closing the window. No trans person will "pass" to that hypervigilant woman, even if they pass to others, because the tiny inconsistencies will stand out to her like neon lights. This is one of the reasons why "case-by-case" exclusion of transwomen from rape centres and DV shelters based on "passing" ability is a stupid idea: the TW might pass to the shelter worker but won't to at least some of the traumatised women fleeing male violence. In those cases, we need to be able to apply a blanket ban.
Even in cases like a guy at my workplace, where I'm only 80% sure he's a transman and not 100%, the inconsistencies I noticed within seconds of first seeing him are what led me to question his sex and make more careful observations that lead me to strongly suspect that he is actually female and on testosterone with a binder. If I'm still asking myself what a person's sex is more than ten seconds after seeing them in the flesh for the first time, then they don't pass because I am not reading them as the sex they want to be seen as, I am reading them as being of unknown sex. I will at that point consciously default to an assumption of male because that's the failsafe assumption when considering my desire to avoid rape.
If I'm not seeing inconsistencies, it's because they aren't there to be seen. My sexual assault history and consequent trauma do not allow me to miss them.