Re: Tantrum
"The problem is that a picture of you at the wedding of someone from a rival street gang can be made public."
Not mention faces in photos being tagged with real names and the cross-linked by FB to other tagged images and use of facial recognition to auto-tag other photos and your "friends" get a message saying you've been tagged in those photos.
Having a picture snapped in a place you'd rather not have others know about used to be pretty safe, but with FB it's quite possible that said photo might actually be specifically highlighted to all your FB "friends" even though you neither published it nor tagged it with your name.