Being a teacher in the US means that you do really give up some of your right to privacy. Teachers are held to a higher standard, for better or worse. Some of it I think is lame, some of it is in some ways valid.

As for the OP, from my reading a few other articles, it's pretty cut and dry. They saw that picture/caption, and denied her a teacher's cert. because of it. As such I think she's totally justified with her lawsuit, that's just plain nonsense.