Comment by abrahamsen

Does sending you a mail message gives you an implicit moral permission to upload my mail address to a third party web-site?

Does adding you as a friend on a social network site gives you an implicit moral permission to upload my "visible to friends" data to a third party web-site?

I guess what you are saying is that the answer to these two questions need not be the same.

[ The fact that Facebook will let you export my data to Yahoo (which will let you re-export it to anyone, just like GMail) kind of indicates that it is not the fine distinction above that governs Facebook's actions. ]