I thought it was the other way round... If you ask me for a copy of Serenity, and i give it to you, then I have infringed on universal studio's copyright. You however have done nothing wrong, because unless you broke into my computer, you would be unable to make a copy without my consent.
Your way makes the whole internet ... broken. anybody can ask for anything, but the guy in control of the resource does not have to honor the request.
I should clarify: technically this is the case. However, it is technically illegal to purchase/receive stolen goods (and you can't really argue that you were under the impression that torrented files were legit, at least for the most common torrents).
I oversimplified because it is tiresome hearing the "But it's not stealing because you don't deprive them of anything" argument.
Your way makes the whole internet ... broken. anybody can ask for anything, but the guy in control of the resource does not have to honor the request.