Once again, enforcement will RARELY be by the police unless you are astoundingly unlucky. It will be by private citizens in the form of harassment or assault. And trying to make it sound like assaults and harassment are rarities for trans people is really dishonest. Unfortunately, a great many of us have encountered such situations. I certainly have, and I know many others who have as well.

Of course, there have been a couple of law enforcement officials who've threatened violence upon trans people they find in the women's room. One of them is in my area.