Recording industry get-tough threats to music downloaders seem to be having an impact on the number of people downloading music on the internet. “Kazaa and Morpheus — two popular file-swapping services — had 15 percent fewer users during the week ending July 6, according to Nielsen/NetRatings. The decline translates to about 1 million fewer users on Kazaa. About 41,000 fewer users signed on to Morpheus and the iMesh file-sharing service that week.”