An anonymous reader writes
"A federal judge in Vermont has denied a motion to suppress evidence filed by three defendants in a child porn case. The three had alleged their Fourth Amendment rights were violated when police used an automated P2P query-response tool to gather information from their computers. That information subsequently led to their arrest and indictments. The judge held (PDF) that the defendants had either inadvertently, or otherwise, made the information available for public download on a P2P network and therefore couldn't assert any privacy claims over the data."