Gay rights t-shirts banned by schools

Pro gay t-shirts are being banned and censored in schools. One shirt, Jesus is not a homophobe, was banned in a school in Ohio because the student, Maverick Couch, was told it was "indecent and sexual in nature" by the school principal. So, any expression of gay rights, is sexual in nature? By that very definition, nobody can ever wear a t-shirt that expresses the least bit of support about gay rights. The very idea is absurd, as is the idea that it is indecent.

Since the 1960s the courts have stated that students have freedom of speech rights in schools, that can be restricted only in a limited context. This shirt does not meet those restrictions, the principal obviously opposes gay rights, and is using his power to restrict speech he dislikes. He can't do that, though of course. Also, how is a t-shirt being a distraction a reason for it to be banned? This is a common argument to justify banning, by the way. Why is a distraction, if other students discuss it? Isn't that what the First Amendment is about, anyway?

There is also another pro-gay t-shirt banned by a school vice-principal, but strangely this is in a state with strong support for gay rights, Massachusetts. The t-shirt says, All the cool girls are lesbians. Now, this shirt might not have the obvious political speech content as the previous shirt, but I have a hard time in seeing the grounds for it being censored. The t-shirt was called by a vice-principal "political and offensive to some people."

Which people, the very few in Massachusetts left who view gays as a dire threat to society? Of course it's political, political speech is protected, even in schools! Just because someone finds it offensive is not a reason to ban it. That would create something called the heckler's veto, where anyone who objects and is offended can censor the speech of anyone else. If so than a gay or atheist student should be able to ban a Christian student from wearing a cross to school, which would be of course, wrong.

There is also a case in Colorado where a schoolbook picture of a lesbian couple holding hands was removed. I am not sure if that case is censorship on the grounds of sexual orientation, because pictures of heterosexual couples were removed, but one removed was the boy and girl kissing. Which is a bit more of course, than holding hands.