It didn't occur to me that the MacBook Air doesn't have a slot for a Kensington Lock. This question is probably more for individuals who live on their own and have roommates but is also applicable to single apartments in case of burglary. What are you doing to secure your MacBook Air? I live in NYC so unfortunately a lot of living situations involve rooming with people you don't know (like on Craigslist). I am aware that the MacBook Air is so light you can carry it around everywhere. But sometimes it is not practical. If I go on a date to a restaurant or go see a movie with a friend, or go shopping for clothes, I don't want to carry it around with me. It is much easier to leave it at home locked up.