An essay on some copyright problems by John Gilmore of the ElectronicFrontierFoundation (EFF), "What's Wrong With Copy Protection".
Essentially this is the real-life effect of what LawrenceLessig described in his book CodeAndOtherLawsOfCyberspace. Whether you like it or not, whether laws prohibit it or not, the manufacturers of hard- and software will dictate what copyright actually means by controlling how copyprotection is implemented.