The recording industry was hoping that the 261 lawsuits it filed against file-swapping music fans last month might have a chilling effect on the whole online piracy problem. But in fact, the opposite seems to be true: according to one independent research firm, “the number of people using these file sharing services in the first 10 days of September is up more than 20 percent from the August average.” Of course, the industry will be going ahead with the lawsuits, regardless…