It was not illegal to be expelled from high school for dating because the school expelled students based on the school's rules and regulations. These rules and regulations might include rules that prohibited dating. However, if the love behavior is out of true love and mutual respect and does not affect the student's studies and relationships with other students, then the school's approach may not be wise. Of course, the school could also make a judgment and decision based on the specific situation. No matter what, it was important to abide by the school's rules and laws to protect their own and others 'safety and interests.