When Facebook recently changed its terms of service to no longer allow users to delete their data when they leave the service, it justifiably created an uproar Just what is Facebook planning to do with this data, and isn't it mine to delete if I wish.

In a blog post, Facebook CEO Mark Zuckerberg tries to calm everyone down Essentially, he says that the issues are not so cut and dry When you share your data with someone else, whether it be an email or a photo, it becomes their data as well.

You cannot normally rescind data you share with other people in an e-mail So why should a social network be any different? Zuckerberg explains: