I think you're overcomplicating things. If a person walks into a public bathroom and starts leering at people, or worse, this is likely illegal regardless of th

I think you're overcomplicating things. If a person walks into a public bathroom and starts leering at people, or worse, this is likely illegal regardless of the person's gender. Just ask Larry Craig. https://en.wikipedia.org/wiki/Larry_Craig_scandal https://en.wikipedia.org/wiki/Larry_Craig_scandal (The original charge in his case was for "Lewd Conduct" but he eventually pleaded down to disorderly conduct.) A person's perceived gender (which will be a function of that's person's subjective gender identity, among other things) will play a major role in determining whether a person's conduct is perceived in this way. A woman in a women's bathroom would likely have to do something pretty overt to get herself in trouble. A person who appears to be a man will, presumably, be on much thinner ice. It seems to me that a combination of this and the prevailing social pressure not to wander into the wrong bathroom should be all we need. And, after all, nobody to my knowledge has ever presented a shred of evidence that there is actually a problem with people using the "wrong" bathroom to warrant the sort of legislation we're talking about--especially when that legislation will indisputably harm an already marginalized segment of the population.