Some residents of North Carolina don't like the idea of sharing restrooms with transgender men and women, and they were pleased to learn that, thanks to a new law, they won't have to. I have news for them: They already have. They just didn't know it. And they will again. In February, the Charlotte City Council approved an ordinance strengthening protections against discrimination based on sexual orientation or gender identification. It included a provision stipulating that transgender men may use men's restrooms and transgender women may use women's restrooms. That provision brought on a hailstorm of fury and disbelief, and...