Nice. If I were writing an emulator, I would naively write a virtual disk drive that always worked. It would never occur to me that some programs would depend on certain reads being inconsistent.

I do wonder, though, if anybody has studied the ROI of antipiracy schemes like this. The only time I bothered to pirate software like this was when I was a penniless kid. And it's clear from this that the crackers were willing to put in absurd amounts of effort to break encryption; if one's opponents aren't rational economic actors, I'd think it would be easy to spend far more on copy protection than would ever get paid back in additional sales.