I've read about people crying that some copy protection are so hard that sometimes they can't play their legal games while pirates can play with minor problems. *cof*steam*cof*
thats the reason i personally dislike copy protections, it only harm people who pay for the game and leave the warez scenes with a often better version of the game
as Will already said, if someone dont want to pay for a game he still wouldnt do if there would be no warez version, guys who like the game will still buy it

i personally own some games that only work under 98/ME or xp due to copy protections ._.
the guild 2 addon can only installed when i use a mini image cause the original one will not work, copy protection ftw...