What's wrong with free speech inside a public school (assuming you don't use it to bully or disparage a group of people)?
If it's a distraction, the courts have ruled free speech can be denied in public school....and I and most people agree with them.
You can have your free speech in college, but you can only do it in certain zones.....and remember, nothing offensive to a protected class. That's right out! Keep your opinions to yourself, people didn't come here to learn about different opinions and thoughts, that might trigger emotions or something.