Need naked shots to determine if they are men or women. Remember they can use the locker rooms and walk around naked too! So even if they dress like a woman when they walk around naked...could you tell they were men? If so they have to use the men’s room.
If they don’t like it they can find a private stall somewhere. Why should we all suffer because of these few individuals?
That’s an idea. Naked ID cards for everyone. Then when you see a woman with suspicious “man hands” in a woman’s bathroom you can call 911 and the police can check their ID.