If you're on the internal network, you're most likely using an internal DNS server which would not care that the registrar claims some other DNS server is now authoritative.
I suppose it could be a problem if you're not on campus; or if any third-party services are not using their own domains (e.g. mit.blackboard.com)
E.G. if they had blackboard (course docs, homework, etc.) on blackboard.mit.edu then that would be hosed right now, wouldn't it?