The point is, men in women's bathrooms is an insane idea.
And what about the "true" trannie that dresses like a woman, and looks very much female? What if he decides your 9 year old is his cup of tea? This law has NAMBLA written all over it.
And finally, this is so stupid on it's face that one doesn't have to be a crazy right wing fundamentalist Christian conservative to see the idiocy of such a law. Anyone that approves of this stupid law has been beaten down into thinking they are fascists if they don't let it happen. Remember Lot sat at the Gate of Sodom and watched what went on day after day never thinking to get out of there. Common sense is NOT bigotry.
Law or no law the things you suggest can and do happen. ALL females of any ages should be taught safety in numbers. And believe me no 9 year old of mine would be unaccompanied in any public restroom. Lesbians can be just as aggressive to children as can a male.
As you said common sense is not bigotry. Common sense would dictate that parents protect their children and not leave them unaccompanied. My 14 year old granddaughter has no idea why I have to “wash my hands” at least if she goes into a public restroom, but common sense tells me she will not be in there alone.