There’s something to be said for protection against casual copying.
I think there might be even more methods worth researching. I recently did a job editing together a reel of material for a friend. One of the sources was a dub made on a desktop DVD recorder- where you feed in video and it records right to DVD. For the life of me I could not rip that disc- and it was to his knowlege recorded without any copy protection engaged on the set top. All my tools were crashing on it. So there may be more out there to look into.
Noah