While on exchange, midshipmen and cadets are not actually treated like prisoners, though they do face some teasing.
Cadets call their midshipmen counterparts "squids" or "middies," which midshipmen hate.
Midshipmen refer to cadets as "whoops," a reference to the monkeys in The Wizard of Oz. It's said that the costumes worn by the wicked witch's flying stooges were designed after the uniforms worn by cadets at West Point.