Robert Stevens, a Virginia man who sold videos of fighting pitbulls, was prosecuted in 2004 under a little-used federal law that prohibits the sale of images of illegal cruelty to animals. Free speech advocates have challenged the law , and will get t hearing in the US Supreme Court beginning on October 6. Animal rights groups are lining up in support of the law, which makes exceptions for depictions that have serious artistic value, leaving the customary huge gray chasm for litigation and ongoing news blurbs like this one.