There is an additional privacy "hack" that I noticed a few years ago. The surprising thing is that as of about a month ago the hack no longer works -- not because Facebook stopped it, but because your data on Facebook is now less secure by default, removing the need for the hack!
It used to be that when a friend was tagged in a photo album of a non-friend, you could only view those photos that your friend was in. By removing the "id=xxxxxx" from the URL, you could view ALL photos from the non-friend's album.
As of recently, you can now view ALL photos from any non-friend's album if a friend is tagged in only one of the photos (alleviating the need for the "hack")! Hence, for all their talk about privacy and their very complicated privacy settings, it seems that in some ways your Facebook data is becoming subtly less secure!
It used to be that when a friend was tagged in a photo album of a non-friend, you could only view those photos that your friend was in. By removing the "id=xxxxxx" from the URL, you could view ALL photos from the non-friend's album.
As of recently, you can now view ALL photos from any non-friend's album if a friend is tagged in only one of the photos (alleviating the need for the "hack")! Hence, for all their talk about privacy and their very complicated privacy settings, it seems that in some ways your Facebook data is becoming subtly less secure!