Expire; To become obsolete. Something that in the world of the internet is a rarity. So much so that every little thing you do on the internet is being watched and can be pulled up years into the future by anyone. A scary prospect I know. Future employers, parents or anyone with an internet connection can see your life in front of them. So with Apple building an Ad Hoc network it allows people to be less cautious about what they post and be more honest and real. Surely that's got to be a good thing! I think for my generation at least, my entire life is digital and for some of the things I say or write to expire after they are no longer relevant is a step in the right direction for privacy and security.