It is my unequivocal belief that the student body is too harsh in the way they react to Stargirl. While her actions could understandably make students uncomfortable at times, Stargirl's only "crime" is being different and not caring what others think. The fact that she is undeterred by students imitating or mocking her should give rise to respect or admiration rather than the derision that Stargirl faces.

Even when Stargirl changes her identity to become "Susan" and does her best to behave and dress like other students, she is still not accepted. Even though she has bowed to their wishes, the student body still treats her cruelly, and this harsh treatment seems to have no logical reasoning behind it.

Another harsh element of the student body's treatment of Stargirl is how their opinion of her constantly changes. When she first arrives, she is greeted with scorn and derision. Slowly, certain classmates fall under her spell, and she becomes far more popular. Then she becomes a cheerleader and commits the faux pas of cheering for everyone rather than just her own team. This leads to her being a social pariah once again, even though those who had gotten to know her should have been able to see that she was a pure soul who didn't have it in her to not be happy when somebody did well.

Later, at the school dance, Stargirl is suddenly popular again, providing the final loop on an emotional rollercoaster that must have been very difficult for the previously homeschooled Stargirl to understand or accept.

In a nutshell, the Mica High student body prove themselves to be stereotypical teenagers who struggle to accept somebody that does not fit into their definition of "normal."