I can speculate only. I do not have any children that are girls. only boys. so if I did have a girl in sports and a dude was there, I would first use words that would be defined as WTF and there is a mental institution down the road.

If that did not work I would talk to the parents or guardians. That is the key. They would determine on what happens next.

if other parents started to yell at me and they did that majority thing and claim they are the popular kids and started picking on my kids... I might resort to kicking all the parents in the nuts.

I think people should stop hiding and looking the other way for a very long time. God may of known this about me and therefore this is why I do not have any girl children.

on the reverse if my boys said they were girls and wanted to play in girls sports.. I would use words first defined as WTD and there is a mental institution down the road.