1) explicit != highlight 2) it'd actually be quite trivial, no notice required. If the user opts out of sharing a specific type of data, the app just gets an e

1) explicit != highlight 2) it'd actually be quite trivial, no notice required. If the user opts out of sharing a specific type of data, the app just gets an empty entry. Apps already need to deal with the fact a user may not have any photos/friends/whatever-data-they-want-to-access.