I agree with naeemebrahimjee. It's a form of expression. I have a teenager who expresses himself through what he wears. He doesn't conform to what the majority of his high school wears. However, others feel the need to criticize those who choose to be different.
He usually gets some comment from those who are ignorant on a daily basis. He wears printed tees quite often. He likes to wear printed tees which reflect his taste in music.
As you see in the picture, not traditional Homecoming attire. He dared to be different.