The sad thing is those authorization things don't work, either. They just put legitimate users through hell, and the warez kiddies find a work-around. Then there's other copy protection schemes as well- CD-verification (which is also easily defeated, and is incompatable with some types of CD-roms), the dongle (a generic term for a piece of hardware which must be physically connected to your PC for the program to function- extremely expensive, and the input can be faked with clever coding), and who can forget the good old code wheel (which, unless you get fancy with blue on red text and red cellophane windows, can be defeated by a xerox and a pair of scissors). Sadly, the major problem with all copy protection is that it makes things tough for legal users, but doesn't perform the purpose for which it's intended- stopping illegal distribution and use of software.