that trans-rapist thing

I've talked before about the moral implications of trans people, sports, and martial arts. Another area in which I see moral problems for trans people has to do with where to jail them. A biological man rapes some women, undergoes a transition, then is placed in a women's prison? Another biological man commits some crime, undergoes no physical transition but merely claims he's a woman, and that's enough for him to be placed in a women's prison? In other words, all the fox has to do, to get into the henhouse, is self-identify as a chicken?

Following the libertarian way of thinking, I'd contend that the above limit cases all involve harm in some way. For the martial-arts and prison cases, we're talking mainly physical harm. For the case of trans women competing in girls' and women's sports, we're talking more about psychological harm. For sports and martial arts, the easiest solution, in my opinion, is to create a new trans category for competition. For prison, I don't know. A "trans" prison is conceivable, or a person could be jailed in accordance with his DNA, his chromosomal reality. The latter strategy would be cheaper; there'd be no need to build a "trans" wing in the prison. One way or another, we need to figure this out so that we don't have biological men trapped inside with women. The more I think about it, the more I think the brute-reality approach of jailing according to DNA is the better approach.