It isn't a political fight worth fighting. Again, how are you able to tell a transgender or transvestite until after the fact? The courts are deciding.
http://fox40.com/2016/04/20/transgender-teen-wins-federal-case-over-bathrooms-title-ix/
As I'm sure you're aware, there are jurisdictions that now have no questions asked. Just as with gay marriage, the courts will ultimately rule, and no doubt this one has a long way to go. But part of the issue again is Trump, whose campaign against political correctness seems to have met limits. Will he stand up for those who are being called bigots because they want some gender privacy, or because they don't want their 10 year old daughter to have to share the restroom with some 60 year old 250 pound male? I can live with gay marriage as long as religious institutions aren't forced to participate. They have their privacy; I have mine.
This issue is different. The privacy that the left so emphatically demanded has now been turned on its head. My granddaughter has no right to privacy or a feeling of security, and to demand that for her is tantamount to bigotry. This is a big PC issue right out of the Donald's own campaign. So where is he?