Regardless of what their agenda or malfunction is it doesn't entitle them to abuse other people, and an attitude adjustment appears to be in order.
I never said that a person suffering from a genetic or mental disorder should be allowed to abuse others. Clearly, the boy in the article is claiming to be "transgendered" in order to gain unfettered access to girl-only areas. This is a clear kind of abuse that is predictable in this environment where every mental illness related to sexuality is something to be celebrated rather than treated.
However, there are a small number of people who have the XY chromosomes yet are physically female. They are not "transgenders"--they have a genetic disorder, and may not even know it. A policy that treats everyone as boys on the basis of XY chromosomes would be unfair and abusive to these individuals.
Who ever examines their own chromosomes? I’m a trained biologist and have never looked to be sure I really have a Y chromosome.