Weird ghost journals

I keep getting notices from Dreamwidth that someone has subscribed to my account, and going to their journal and finding nothing.  No entries at all.  Just a picture of a pretty woman.  Once or twice might be actual people who just want to read and comment, but this has happened like six or eight times.  People who just want to read and comment wouldn't all be pretty young women.

I assume these are some kind of scam?  Does anyone know more about what is going on?