Pirating content is bad, mmkay? That doesn't make it okay for the content creators to install malware on your computer.
The entertainment industry would like you to stop pirating things. They've tried digital rights management, prosecuting file sharers, and even making films like The Last Airbender that were so bad nobody would want to pirate them. Nothing's worked. You jerks keep stealing content, so now the industry is asking Congress to let them install malware on your computer to get you to knock it off.