It's bad to be rude to someone.
Marcus is annoyed at the people in the next dorm because they interrupt his sleep with parties, and he overhears them complaining about low exam scores.
Marcus wants the boys to stop partying.
Marcus offers to tutor the boys in exchange for them holding less parties.
Marcus tells the other boys that they might make better grades if they studied instead of throwing parties like silly cave me.
During the tutoring sessions, Marcus is able to convince the boys to have their parties at another location.
Marcus is shunned by the other people in the dorm for his snobbish behavior.