I realize you're merely pointing out someone else's concern, but it's important to know that laws already exist for (1) peeping on another person in a bathroom and (2) indecent exposure, and both would be applicable in the case of male perv in a female bathroom.
And, similarly and just as important, assault and battery laws already exist preventing people from and punishing people for beating someone up, whether in a bathroom or anywhere else, whether because they look like the "wrong" gender or for any other reason.
Look, I've said about 10 times that I'm against HB2 and think it is stupid and should be repealed for a variety of reason. But, I also think that the CLT ordinance is equally as stupid and doesn't address the fears of the left in the same way it doesn't justify the fears of the right; all it does is serve as a lightening rod for something it doesn't even address. This is what the CLT ordinance boils down to:
1. Threatening or beating up someone in a bathroom is already illegal, regardless of what bathroom someone goes into or whether they do or don't have a dick. Despite that current legal status, trannies (a very small percentage of the population) wanted additional provisions that allow them to go into whichever bathroom they feel most comfortable (whether justified or not).
2. Perving someone in a bathroom is already illegal. Despite that current legal status, some people want only people people of the same natural-born sex in the bathroom with them and their kids, because that makes them feel more comfortable (whether justified or not).
3. The CLT ordinance is not about assault or perving on either side, it is solely about the comfort of the individual covered by it. That's it. It doesn't create a hate crime or protected class or anything else actually meaningful.
4. By accommodating the comfort of those in #1, it has the effect of ignoring the comfort of those in #2 and making them uncomfortable. It prioritizes #1 over #2 (no pun intended). So it isn't providing equal anything, it is emphasizing the comfort of one group over another, which by definition promotes inequality.
So, as I've said several times, the CLT ordinance is simply a hyped up millennial "hey look at us, we're so different and unique and special that our comfort is more important than yours" statement. That's it. It was completely unnecessary from an actual (criminal) protection standpoint, and only serves to divide people by prioritizing the comfort of some over the comfort of others.