I paid money for my account! MUDding is a right, isn it?
Don’t believe that for a second. When you paid money to your school’s computer department for an account, you entered into a contract with that department. Most schools have a well written Computer Policy document, that will detail exactly what you have rights to. Most schools classify MUD as a game, and games as non-essentials. Therefore, if your school decides to shut off all games, or disallow you to telnet out to play muds, you’re stuck. Don’t try to get around it; they’ll find you. Instead, try to talk to the Powers That Be, and see why they did what they did. They may have very good reasons for it (such as limited resource that really need to be dedicated to schoolwork).