I just can't sympathize with this viewpoint at all. Your email address is the first thing you give out to your contacts, so that they can contact you. Before Facebook, anyone who wanted to contact you via the Internet would need to know it. A "friends list" is totally useless without this one vital piece of information.
So "friends" need your permission to email you ? I am comfortable with the idea that my friends will store my email address in their personal address book (or data store)...
No, that's why I have my email visible to friends.
However, that doesn't mean I give them permission to easily mass import it through Facebook to whatever *Ville app is popular that day. If they allowed email export, my email is very quickly being hidden.
A problem here is that the 'download my data' feature doesn't let you download any sort of primary key for your friends. A name is not a primary key--I have many friends with the exact same name.
Could you explain this ? I am confused now.. I was under the impression that your email address is not exportable if you do not display it http://www.facebook.com/settings/?tab=privacy. So is not similar to me manually writing it down on paper ?
Same argument I see others posted. I downloaded my data ONLY to get my friends contact information. They don't give you that. The wall posts, photos, and friends names have zero value to me.