The fact that we're reduced to quibbling about the length of time someone keeps their copied data as the "qualifier" for if it's legal or illegal activity tells me we're really splitting hairs here.
As far as I'm concerned, our legal system is already overburdened with work to do, handling serious illegal activities that directly threaten human lives. It's counter-productive (and rather pathetic, really) that we've made it a *federal crime* to duplicate some music or movies and hang onto digital copies for a while! Netflix is successful because they give people access to a VAST library of movie content. They're not going to suffer financially if a customer starts ripping and keeping copies of all the discs rented from them. He or she wouldn't be able to rent everything Netflix has available in his/her entire lifetime, most likely!
The ONLY reason this stuff is "illegal" in the first place is thanks to lobbyists working for the big content industries. They decided to try to maximize their profits by letting our police act as their own personal collection agency.
I agreed.