I didn't read the article, but doesn't Parental Lock on dvds do the same thing?
Nope. If you enable parental controls on a DVD or TV (V-chip in the case of the latter) then it's a binary situation -- you can either watch the movie/show w/o the code or you cannot.
And, no, you won't be able to watch NBK, or Kill Bill, or a porn movie any other super violent/super sexual movie through this system -- the company providing the screening data simply won't screen those kinds of movies because it's pointless.
The real issue, however, is that the screening process is rather arbitrary. Different screeners will block scenes that others wouldn't or vica versa, and to a large extent it's not even consistent within movies. One of the examples given is in
Black Hawk Down. When an American soldier is shot
the moment of impact is not shown, but when a Somali is shot not only is the bullet impact shown, but often the after effects (twitching body, etc.).
Honestly, I agree that this is a cop out by parents. If a movie has a particular message and the parents feel that their children should see it, then watch it in full. If there are only a few scenes that are questionable then fast forward through them yourself. That or simply don't show your children the movie (my preference). Yes, you won't be able to see as many R-rated or even PG-13 rated movies. Welcome to parenthood.