Let kids find their own identity by being kids

My son and I were having a wonderful conversation last night. I can't remember how it started, but we were discussing boys vs girls. I told him about someone I had recently heard about who was discussing her grandchild, who was born a boy, but the mom wanted a girl so badly that she gave the child a girl's name, and is bringing him up as a girl. So wrong in so many ways. My son's first reaction was - that child is going to be so bullied by all the kids at school one day!