Children are brutal when it comes to peer pressure and such. They do not engage in white lies, they say it as they think it is.
If you send your boy in a pink mini dress to school, you will not be doing him a favour.
There should be some rules on how humans present themselves when in public and in groups. I mean, if society would be such that ypu could walk down the city center naked with all reproductional organs exposed with nothing but a kkk t shirt, this simply would not find acceptance.
In summary, kids minds and kid environments like school are fertile grounds for bullying under peer pressure etc. It is good if a school promotes freedom of expression and tolerance, but some very vocal minority groups want everything yesterday and are pushing it down everyones throats.
Having had a close family member losing 5 years of his life and his savings to a fortuneteller crook has made me realize that people with too much of an open mind, in a crisis situation, will believe the most ridiculous coping strategies told to them by others. Kids are often insecure and easy to influence, I think they should be kept away from people promoting irreversible things like gender changes. Cigarettes , gambling and alcohol are forbidden to be promoted to minors, so should be this.