During the first two years of highschool I never done any homework, and all my grades were above B. They were thinking highly of me and never bothered to check if I had ever done my homework. But ever since I moved to another highschool, I started doing homeworks because they checked thoroughly every class, and if you don't have it you get an F.
Never got into trouble, except once when I bumped into a class mate and then he stumbled and bumped into a teacher .. making her fall on another kid. The domino effect.