INDIANAPOLIS — Two sophomore girls have sued their school district after they were punished for posting sexually suggestive photos on MySpace during their summer vacation.

The American Civil Liberties Union, in a federal lawsuit filed last week on behalf of the girls, argues that Churubusco High School violated the girls' free speech rights when it banned them from extracurricular activities for a joke that didn't involve the school. They say the district humiliated the girls by requiring them to apologize to an all-male coaches' board and undergo counseling.

Some child advocates argue that schools should play a role in monitoring students' behavior, especially when dealing with minors. And the U.S. Supreme Court has ruled that students can be disciplined for activities that happen outside of school, so long as the school can prove the activities were disruptive or posed a danger and that it was foreseeable the activities would find their way to campus.