U.S. companies should be allowed to take aggressive countermeasures against hackers seeking to steal their intellectual property, a report says. The private Commission on the Theft of American Intellectual Property says China is responsible for the theft of hundreds of billions of dollars of intellectual property each year. The report stops just short of recommending that businesses be able to retrieve stolen information from within an intruder’s network, and to disable or destroy it without any limitations. Rights advocacy groups have expressed concern over the move to move IP owners to hack back or IP owners and IP thieves.”]