I know that defense is a part of all Vex competitions, but in my opinion an autonomous program that is only defensive is unfair. For example, a team could just program a straight forward driving robot that did nothing else but drive forward and block an actual, functioning, scoring autonomous program. The spirit of Vex games is to score points, not to be solely defensive. Furthermore, a program that scores points is more impressive and shows off the skill of your team better than a robot that just drives forward. I am hoping that in the future purely defensive autonomous programs are banned, not just because they don't make sense and are not the point of an autonomous, but also because they can harm robots by burning out drivetrain motors when they trap the opposing robot.