US judge rules for teen girls in "sexting" case

* U.S. judge rules against prosecutor in "sexting" case

* ACLU applauds decision

* Ruling may spur abuse of legal system - prosecutor

By Jon Hurdle

PHILADELPHIA, March 30 (Reuters) - A U.S. judge on Monday barred a Pennsylvania prosecutor from filing child pornography charges against three teenage girls caught with sexually suggestive pictures of themselves on their cell phones.

U.S. District Judge James Munley said he was issuing a restraining order on Wyoming County District Attorney George Skumanick because his proposed action would violate freedom of speech and parental rights.

The ruling came after the American Civil Liberties Union sued Skumanick on behalf of the girls and their families.

"The court agrees with the plaintiffs that the public interest would be served by issuing a TRO (temporary restraining order) in this matter as the public interest is on the side of protecting constitutional rights," the judge said.

The case has attracted national attention and revolves around the growing practice among teens of "sexting," a play on the term texting, in which nude or semi-nude photos are sent on cell phones or posted on the Internet.