I think we get your point!!! You have an autistic son, therefore your circumstances are different. This is NOT what the OP was talking about. This thread is not about YOU and YOUR situation.
This is not about a 6 year old special needs child!
10 years old is TOO OLD to be dragged by Mommy's umbilical cord into the GIRLS bathroom. As I posted before, I have 3 DSs and 1 DD, so this issue is not one that I personally have not dealt with. Since we have established that there ARE companion bathrooms in WDW, then those parents who insist on humiliating and embarrassing their sons need to use those restrooms. They will have plenty of company in there with the mothers who insist on breastfeeding their kindergartener!
Keep the pre-teen (naturally curious) boys out of my DDs restroom. The 'in your face' attitude of some of the mothers here deserves some backlash. If someone asks that boy to leave, and the mother either laughs or refuses, then security needs to be called. I think it is horrible that a mother would subject her son to such humiliation.
Use the companion restrooms if paranoia is an issue, or allow him to stand outside the door.
Good grief, this isn't a competition to see who here is the better parent! The goal of a good parent should be to raise a happy, WELL ADJUSTED child. Too many perverts and serial killers had issues because they had FREAKS for MOTHERS!