Wow.
A decent argument might look like this: in constantly drawing attention to a small number of transwomen who are violent offenders, the people insisting on restricting women's prisons to women only are catastophising and taking the actual stats out of all proportion, and in doing so, throwing transwomen like (insert case where accountant was convicted of embezzlement/ shop lifting/ failing to pay fines on TV licence) into a male prison which is clearly the wrong place for them. Let's work on making prison safer for everyone. I happen to think this argument should be aired, and dealt with properly and respectfully. There is also, I think, some truth in the catastrophising accusation - yes, we need to be mindful of the Davina Ayrtons, Kathy Brannens and Lisa Hauxwells of this world - but we also have to remember that they are not representative of most transwomen, any more than ISIL terrorists are representative of Muslims.
(Now, I think that particular argument still has to deal with the fact - fact, note, not opinion - that 90%of incarcerated violent offenders are male, and 98 to 99% of incarcerated sex offenders are male, and also has to deal with the fact that this thread is actually about men who aren't trans taking advantage of self identification to gain access to women's prisons, either because they think it will give them an easier ride, or because they are sexual predators who want access to a literally captive pool of potential victims - concerns raised by the professional body of psychologists who actually work with these offenders in prison).
But instead of a reasonable discussion, we've had a poster argue that female sex offenders (the 1 to 2%) deserve to spend their incarceration in fear of being sexually assaulted (which might feel like poetic justice to some, but is hardly the hallmark of a civilized society), that she'd sooner save computer hardware from a fire than human beings, that the pay gap is a myth but misandry is a thing (a made up word, which makes about as much sense as claiming white people are ever victims of institutionalised racism as opposed to one off instances of racial prejudice). Then when people didn't agree with her, she reached for the most pejorative word she could to describe our anatomy, describing us as "havers of cunts".
Not really doing your argument a lot of good here. If I was that transwoman accountant in prison for embezzlement, I'd be thinking "with friends like that, who needs enemies?"