Yes. They are making a political point. Isn't that blazingly obvious to you? And yes, they shouldn't be allowed to be worn in school.
As a parent I'm all for school uniforms, 2 of my grandkids attend a school currently where school uniforms are required - the other 3 are in public schools with permissive dress codes.
Schools that have permissive dress codes can't arbitrarily enforce stricter codes on some kids while giving others free reign. Codes of any kind need to be equally enforced, or equally permissive.
This is why people raise a fuss, when some kids are treated differently than others.
Teenage boys, at least from my experience, want to wear crazy stupid T-shirts. It's their form of rebellion I think, as well as a way to fit in with their peers.
When my daughter hit puberty I couldn't allow her to pick out her own clothes much because she wanted to dress for school like a 2 dollar harlot.
I was far more permissive with my son because he didn't try and dress like a harlot, but we had our own fights over T-shirts.
He bought them with his own money so I didn't take them away but I did try insisting he not wear them to school, I lost and he was sent home. Not a big deal, I expected it... Lol.
That was in the day of South Park, when kids my son's age were figuring out ways to watch the stupid show without parents knowing and that show was a major talking point among my sons peers - enter my son using his own money to buy silly shirts.
That Tshirt was his rebellion against all things parental - which was truly mild compared to raising a teenage girl.
It seems not much has changed, and teenage boys are still rebelling and fitting in via the t-shirts they wear.
Any school, even public schools, can institute school uniform policies - the ones who don't will always have to deal with issues related to clothing. Some issues are more serious than others.
The fact that THIS shirt is seen as a rebellion and a means to fit in with peers says a lot about how negative the LGBTQ agenda in our schools has become - and it's frightening to me. 1st because it's elementary level knowledge (only boys and girls - not beings who look like us with different sex organs) and second because in school it's as basic as 1 + 1 = 2... Yet now it's somehow seen as so inappropriate to show/say in public the child should be sent home.
This kind of "now" is the kind to fight against like our lives depend on it.