The problem with making it legal is that it permits openly masculine people to enter the women's room with a built-in excuse for why they're allowed in there.
First, the idea that transgender exists is absurd. Nobody is born in the wrong body. Second, men look like men, no matter how they dress. I haven’t seen a cross dresser yet that looked like a real woman. Third, every person should be required to use the restroom and locker room that agrees with his or her physical “equipment”. If these men are that serious about believing they are women, let them have their bodies altered to fit their reality.
Transgendered people are like unicorns - a fantasy. These are homosexual men who are completely messed up. They desperately want society’s approval so they can believe their perversions are normal.
If men are allowed to use women’s bathrooms and locker rooms, this will be the death of shopping malls and gyms, and it won’t do much for restaurants, either.
IF and when open bathroom season comes to my state, I will be plotting to spend some time in random ladies’ rooms. Stand at the mirror, apply lipstick to my outwardly (and inwardly) male persona, for hours in a non-threatening but yet disturbing way, with purpose of freaking out those who enter.
Some legal insurrection will motivate some vocal moms to get busy with their legislators and get the madness fixed.
Rosa Parks in the front of the bus ain’t nothing compared to a rash of freaky 50-something males in the ladies rooms.