While I do understand that fear can be justified despite the rights that LGBTQ has fought for, if I happened to sleep with someone I found out was a male, I'd have a hard time forgiving myself for that. It would bring about the kind of pain and sorrow that would be suicidal - how would I live with that? I couldn't even look at myself in the mirror the same anymore, knowing I fucked a "woman", but was really a man. I'd have to live with the fact that I UNKNOWINGLY had gay sex.
As for the man I was led to believe was a woman and that I fucked, I don't want any hostility, so I'd let it go, but I'd be fucking mad for a while (nothing violent though).
On a side note I'm
NOT JUSTIFYING hate crime here - attacking someone because you don't agree with their bodily presentation is unacceptable, but I'd call it a hate crime ONLY IF he was being targeted solely for presenting himself as a female. Even after-the-fact sex is still not a valid reason to commit violence, but in my eyes, it's sexual violence to present for a MtF trans to present himself as a female and not telling the other man that he is MtF.
If it were me, I'd feel incredibly sexually violated if a MtF trans wanted me to fuck him and he didn't tell me he was a man - I would have UNKNOWINGLY had sex with a man. TBH just typing that out makes me feel like I just got raped.