I'm curious where you get your information. I've heard of absolutely no companies stating that they'd have gender neutral locker rooms.

As for people who "simply identify" as the gender other than what you perceive them to be, I actually know numerous trans people. I'm not sure if you do, or not, but I'm guessing that you don't. Most live in fear of being physically attacked for being in the restroom they feel is more appropriate for them. I'd like you to name even a handful of cases in which someone who was actually transgender went into a bathroom and hurt anyone in any way.

The fact of the matter is, if someone is going to be brazen enough to take photos in a restroom, they're going to do so regardless of whether you legally allow them in the restroom or not. To discriminate against the trans community because someone might take advantage of a policy is unethical. 

Oh, and trans people have already been using the restroom they feel is appropriate for them all along.