This whole thing is ridiculous. Is "Rachel" pre-op, post-op? Does it even matter? When the alien archaeologists come and dig up "her" bones 2000 yrs from now, they're going to find xy chromosomes, measure the hip and pelvis, and like Austin Powers say "its a man baby!" Frankly I'd be pissed if I were any of the other ladies racing, and that 6'1" dude dressed as a woman came and poached their race. Our society has gotten stupid. You want to change who you are, fine, have it, just don't expect anything from me. I'm not obligated to entertain you or give you any special treatment. And in sports, there definitely need to be rules around this type of thing, because you're either born a man or a woman (rare exceptions like Jamie Lee Curtis), with all the advantages that come with being either gender. You can get surgery and take all the hormones you want, but biologically you are what you are.
As a side note, your now opening the door to any creep out there to dress up like a man or woman and go into the public restroom with your son or daughter. I don;t think so.