If it is happening, it might some day be culturally accepted. There are steps after that. Are you allowed access to your own history? One big business aspect of

If it is happening, it might some day be culturally accepted. There are steps after that. Are you allowed access to your own history? One big business aspect of gmail is that - easy searchability of your whole email history. It will contain stuff written by other people as well. Will there be some policy of email expiration? In the end we get to something like in science fiction. Hannu Rajaniemi's Quantum Thief has externalized common memory and also your private memories that can be recovered. Also pieces of them that can be shared directly. Such centralized systems have a whole host of new security problems.