Dude, make a video of this and post it to youtube, then drop us a link. I want to see this "bit rot" in action.
I've never heard of this before. While I'd hate for any of my carts to have bit rot occur to them unintentionally, I wouldn't mind purposely causing it to happen to a duplicate cart or two (I'm looking at you, Mario/Duck Hunts!). I really dig video games flipping out as their universe collapses in on itself like when certain Game Genie codes are entered. Cory Arcangel created a movie with Paper Rad about this kind of deterioration of the world of a video game as it ages. I am certain I've posted it on DP before, but screw it...