I often find myself wanting to watch my movies when I’m on-the-go, or sitting at work writing code. I also have one Blu-ray player in the house, and hate having to sit through one unskippable warning or commercial after another. Because of this, I choose to exercise my fair-use right to format-shift my movies into something more convenient. Making a personal backup of movies you own is in a legal gray-area in the U.S. Historically, this sort of thing fell under fair use law, but the DMCA (1998) makes it illegal to crack the encryption.