I AM NOT [?] ENTITLED TO MY OPINION

So in class my teacher gave a small peck talk about our "Rights".Saying that we have limitation on what we wear,say,and do.Think about it? This made me think about how we really don't have control.Like for example school.When you walk into school they have their own rules and our rights are kind of cut out ..There is many but some of them you might now like u can not threaten the president that is a major No,no...