Well, it's kind of a protection, but not really, although maybe they will implement this.
Basically, here is the deal, you buy a normal DVD movie, you buy it really cheap, like a dollar or two, and you get to watch it, then it expires after 2 days, by the bottom turning black. While it is red, it is watchable, but onc eblack, its not longer good.
I just got one as a gift from a co-worker, so I can't wait for mine to go black to mess with it. Anyway, thought you all might enjoy reading this, its an interesting concept.