I've spent a lot of time both reversing and creating these kinds of schemes. Anyone else here?

I gave a talk a few years back, comparing both retro and modern copy protection schemes. Also designed hardware for dumping floppies at the bitcell level (ZoomFloppy) and co-designed the Blu-ray content protection system.

http://www.slideshare.net/rootlabs/copy-protection-wars-anal...

Now my day job (SourceDNA) is building tools to reverse lots of code at scale. A never-ending stream of apps provides a ton of "wat?" moments as you never expect developers to make the choices they do.