Following the lead of record companies who curtailed rampant Internet piracy by targeting even small-time file swappers, Hollywood studios have launched a first wave of lawsuits against people who allegedly downloaded recent films such as “Spider-Man 2″ and “Troy.”

The seven major studios filed the lawsuits for federal copyright infringement on Tuesday in Denver, New York City, San Francisco and St. Louis. Lawsuits may have been filed in other cities, but the Motion Picture Association of America, which represents the studios, declined to say how many were filed and where.