The best comment so far, "Somewhere out there, someone is panicking because there are strangers' family members in their porn."
Often the "replacement" photo is sort of related to the title. I think there may be an actual connection like the same first few words or something.
Whatever is going on, it's funny. I just hope they can fix it.
AH HA! They figured it out. It was a caching problem and they are fixing it now.