These will be discussed later. An interview is not a conversation. If a reporter has a tape recorder or video camera, always assume it is on. Though you're speaking to the reporter, keep in mind that your message is intended for the public. Your goal is to present your informed point of view.
Faculty have no obligation to allow media into classrooms when they are teaching.
You can ask them to leave and expect them to cooperate. Keep explanations simple. Take enough time to make sure the reporter understands what you're trying to say. Repeat it as many times as necessary. Don't lose your temper and don't get into an argument.