>Wouldn't it be interesting if processes running on my behalf within Facebook or HN couldn't access other users' private data No, because HN comments are publi

>Wouldn't it be interesting if processes running on my behalf within Facebook or HN couldn't access other users' private data No, because HN comments are public and the only reason to share data with Facebook is to make it available to (some) other people. It might be interesting for Dropbox or Google Drive, but even for Google Drive, the killer app and value-add over Microsoft Office is realtime collaboration with (specific) other users.