I'm at the airport where they have free public wifi. There are about 40 people's macbook hard drives online with their drop box. How do I disable my drop box on public wifi connections? How do I make a drop box alias that doesn't have my last name on it? This seems very insecure and an invasion of privacy to me. It didn't even ask me if I wanted a drop box... and i"m sure all these people don't know their files are exposed.