what I want to do I write a dummy program that can be easily pirated but as soon as its loaded, the text turns upside down and it freezes.
an example would be to make a game for Sega cd, save it as a zip, post it to the pirate bay or some other P2P site and when its run, the text becomes corrupted and the file freezes. if its copied to an actual cd, the system's data becomes corrupted. (that last one seems unlikely)