read the article, this isn't about "making free copies of music". it criminalizes fair use. you could get a spam email that downloaded something to your system, dumped your IP address in that server log, only to find the RIAA impounding that log, finding your address there, and sending both the police and a civil lawsuit to your home.
Let's see, they're going after "large scale enterprises invovled in intellectual property theft", and your excuse to stop them is you"could get a spam email that downloaded something to your system" so you might be confused with one? Hey, I guess it could happen, but I doubt it would, at least not very much, and in those cases it did, surely you wouldn't be the only one to protest the issue on those grounds. But turning a blind eye to justice just because a few innocents might get falsely accused is weak, if we concerned ourselves with such things constantly there wouldn't be a single law in the book.